msequintan/wb_publications/wbfinal.pdf · 2007. 1. 6. · Ç@Íjcbm ÌÖ³p Í¥ bvjh>?³piªÎ;...

35

Upload: others

Post on 17-Oct-2020

0 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

���������������� ������� ��������������� �������! "����#$��%'&��%(�*)+��%(#� ��-,.� /���10 �2��3$���4 ���� /�56,.� /�7,859�:�;�����

</=?>A@CBEDEF�G$H;>?IKJLBMIB

NPO;Q:RLS$N�RUTVSUWXRLSYQMW[ZE\^]U_a`CbMcdTVbfe?bhgMikj(TmlnT?]UTVbfWponq[rMs�tvu�w8\�Nx\y\^z�SL]�{8SL]nShQM`CRL|~}�SUW�_*SU`Cu/��b���SU_�_� TVSUe�Zfu9}�\��dqX�vtr

��M�����:��v�;�M���:��P�;�������P�����V��;�M������f����h�¡ £¢^F�¤+ �BM¥�@

jES*O;QM`¦_�z�SUW�_�b�§^¨�|:i�]UTVRL]LuY©�W�TmlMSU`C]UTm_aiªb�§��£TVRL|:T�gKQMW;u�\^W�W«\^`¡cUbf`Lu��«¬8q�­®:�M�

¯PBM°L±ª¯;F�²�>A@h@hBMH�d�

NPO;Q:RLS$N�RUTVSUWXRLSYQMW[ZE\^]U_a`CbMcdTVbfe?bhgMikj(TmlnT?]UTVbfWponq[rMs�tvu�w8\�Nx\y\^z�SL]�{8SL]nShQM`CRL|~}�SUW�_*SU`Cu/��b���SU_�_� TVSUe�Zfu9}�\��dqX�vtr

BMI 

¯M³M´Ip<.F[¢µ´�Bv¥E¶��¡�h@

j·S*O;QM`U_�z�SUW�_�b�§ª¸�SU`¦`CSL]U_a`¦T�QMe��¹QngMWXSU_�T?]Uz·u+}�QM`¦WXSVgMTVS9¬UW;]U_�Tm_�ºx_�TVbfW»b�§½¼½Qf]L|:TmW:gM_*bfW;uY¼¾Qf]L|:TmW:gM_�bfW;uj�}¿u�o;�K�M®Kr

ÀªÁÃÂÅÄÇƪÀ-ÈEÄ

É��Ç°dBM=?°¡H=ÊBfJC��´�¡�h�¡>?IªJC´�(=?BvJC��@�JLBMËM�d@8³MÌ�JC�d�Í�h�¡@ÍJC�Í>ÊBM=XÎ=ÊBMI;�¡J9BM°¡°dH¥EH;=ÊBvJh>?³PIªBv�h³PHI; B-@ͳP=ÊBM�9J*Ï:Î��Ð@ÍJCBM�^Jh´�BvJ$´�Bv@(B-¶>?I�Bv�ÍϽ°d³P¥�Î�BMI>A³PIpÑ8>�JC´Ò@h�¡¥Ã>A¥�BnÓͳP��BfÔx>A@�=ÊBM�ÍËP�d�9JC´�BvIJh´�$JC�d�Í�h�¡@ÍJC�Í>ÊBM=XÎ=ÊBMI;�¡J.�Í�dËP>A³PI�FÕÉ��$Î��¡�ÍÌÖ³P�ͥץóM�h�^Jh´�BMI«³PI�(´HI �Í�d ½@h>?¥·H=ÊBvJh>?³PI;@�Jh³@ÍH�ÍØM�¡Ïö>?I�Bv�ÍÏkÎ�Bv�CBM¥��¡Jh�d��@hÎ�Bv°d�+BMI ÃJh³·Bv°d°d³MHIKJ�ÌÖ³P��@Í�dI@Í>AJC>�ØP�+ �dÎ[�dI ;�dI°¡�^³PIÃ>?I>�JC>ÊBv=°¡³PI >�JC>?³MI@Y>AI»JC´;�d@h�ª xÏxIBM¥Ã>A°�BM=�@�Ïx@�JC�¡¥Ã@¡F~¤+@E�UÔxÎ[�d°UJC�d XÙ�@ÍH;Ú�°d>A�dIKJC=�Ï»Ñ8>? ;��¶>AI�BM�h>A�d@=A��B�ØP��Jh´�8Î=ÊBMI;�¡JÕÌÖ³P�Í¥�BfJC>?³MIEÎ�h³:°d�¡@h@�=ÊBv�hËP�¡=AÏÇHI�BvÛ��d°UJC�¡ �F/¤^@�B��h³MHËP´�BMÎÎ�ͳ�Ô;>A¥�BfJC>?³MI�Ù¶>AI�BM��Ï·@�JLBM�Í@ÕÑ8>AJC´kÎ[�d�Í>ÊBM@�JC�ͳPIEÜ�Ý�Þàßná^¤8âã´�B�ØM�9¥�>?I;>?¥ÃBM=K�¡Û��d°UJ�³PIEJC�¡�h�h�¡@ÍJh�h>ÊBv=Î=ÊBvI�¡JÌÖ³P�Í¥�BfJC>?³MI«Ñ8>�JC´>AI£äyå�¤8âæ³vÌÕJC´�YÎ�h>A¥�Bv�ÍÏPÙÑ8´;�d�h�dBM@�¶>AI�BM��Ï«@ÍJLBv�h@^Ñ8>�JC´pÜdÝ~ç�èä8â�Í�d@ÍJh�h>A°¡J�JC�d�Í�h�¡@ÍJC�Í>ÊBM=�Î=?BMI�UJ�ÌÖ³M�h¥ÃBvJC>A³PIkJC³(Ñ8>AJC´;>?I�äéß+¤8â"³MÌXJC´�9Î�h>A¥�Bv�ÍÏk@�JLBM�¡F�ê(>�ØP�¡IJh´�Y³M¶@h�¡�ÍØP�¡ Ò >?@�JC�Í>?¶H;Jh>?³PIª³vÌÕ¶>AI�BM�ÍÏ«³M�h¶>�JLBM=��¡=?�¡¥Ã�¡IJh@9ÌÖ³M�9@ͳP=ÊBv��J*ÏxÎ[�·Î;�h>?¥ÃBM�Í>?�d@¡Ù;Ñ���¡@ÍJC>A¥�BfJC�$JC´�BfJ�BM¶[³PH;J9ëKá·ì½èvá�Î[�d�Í°d�dIKJ$³vÌ�JC´;�Y¶>AI�BM��Ï«Î�³PÎ;H=ÊBvJh>?³PI«>A@8Ñ8>A �Ç�dI³PH;ËP´½Jh³BM=A=?³nÑ�Jh�d�Í�h�d@�JC�Í>ÊBM=[Î=ÊBvI�¡J�ÌÖ³P�h¥ÃBvJh>?³PIÐJC³·JCBM±M�+Î=ÊBv°d�^H;I>?¥�Î��¡ �d XFÕí.´��=?BM�hËP�9IH¥E¶[�d��³vÌ

Page 2: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ì«åÇì

@Í>?¥EH=?BvJC>A³PI@�BM=A=?³nÑ8@�ÌÖ³P��H@µJh³k �¡Jh�d�h¥�>?I;�+JC´;�� >?@�JC�Í>?¶H;Jh>?³PIóMÌ��h�¡@hH=�JC@�� JC´�^ >?@�JC�h>A¶H �Jh>?³PI¹³MÌ�Î=ÊBvH@h>A¶=?�EJh�d�h�Í�d@�JC�h>?BM=/Î=?BMI�¡J(@�Ï:@ÍJC�¡¥Ã@�� ÌÖ³P�(�¡Û��d°UJC>AØM�d=�ÏÒ� � H>�ØMBv=?�dIKJÇ@ÍJCBM�ÍJh>?IË°¡³PI >�JC>?³MI@dF É��½Î�Í�d@Í�dIKJ��Ö�h³PHËM´��E >?@�JC�h>A¶H;Jh>?³PI@EÌÖ³M�ÐJh´�«IH¥E¶[�d��³MÌ�Î=?BMI�UJC@dÙ�JC´�¡>?�¥ÃBM@h@Í�d@¡Ù�BMI «JC´�¡>?�.³P�Ͷ>AJCBM=X�¡=?�d¥��dIKJh@dF

N�º;c�SLRU_µ|�ShQKZMTmW:gf]�� ¶>AI�BM��Ïp@�JLBM�Í@dÙ�°¡>?�h°¡H¥�@ÍJC�¡=?=?BM�+ ;>?@h±@¡Ù�Î=ÊBvI�¡J+ÌÖ³P�h¥ÃBvJC>A³PI�Ù[�UÔ:JC�hBM@h³M=ÊBM�Î=?BMI�UJC@

�� �����������������������

¤ ¶>?IBM�ÍÏ�@ÍJLBv�9@�Ï:@ÍJC�¡¥ >?@�JC´;�Y¥�³P@ÍJ8°¡³P¥�¥Ã³PIª�Í�d@ÍH=AJ9³MÌ�JC´�Ç@ÍJCBM��ÌÖ³P�Í¥�BvJh>?³PIªÎ;�h³:°d�d@Í@dÙ[BvJ8=A��BM@�JÌÖ³P�9@h³P=?BM� � J*Ï:Î��Ç@ÍJCBM�h@¡ÙXBMI; ½JC´;� � H�d@�JC>A³PI£³MÌ/Î;=ÊBMI�UJ8ÌÖ³P�h¥ÃBvJC>A³PI«>?I½¶>?I�Bv�h>?�¡@8>?@9�CBMÎ>A =AÏ-°d³P¥�>?IË�>?IKJh³ÌÖ³:°dH@¡F/¤�J.=?�dBM@ÍJ! Pá·³MÌÅJh´�#"��Í@ÍJ$ß�$váY�UÔ:Jh�CBM@ͳP=ÊBM��Î=ÊBvI�¡Jh@µJC´�BfJ�´�B�ØP�$¶[�d�¡Iª �¡Jh�d°UJC�d ¾BM�Í��>?IÃ@h³ � °�BM=A=?�¡ % � J*ÏxÎ[�9³P�h¶>�JC@¡ÙPÑ8´>?°L´Ã�dI°¡>?�h°¡=?�8³PI�9°d³M¥ÃÎ[³PI�¡IJ�³MÌ�BÇ¥ÃBM>AIk@h� � H�¡I°d�^¶>?I�Bv�ÍÏ'&v¥EH=�JC>AÎ=?��@�JLBM��@�Ïx@�JC�¡¥�a</ËPËM�dI¶��¡�hËP�¡� SU_�QMe)( åMáPávëÙ�*+BvËP´�B�ØvBMI SU_�QMe)( åMáMá,+;Ù�-µH;Jh=?�¡� SU_�QMe)( åMáMá,+.�UF�í.´>A@+@hBM¥ÃÎ;=?�(>?I°¡=?H ;�d@/ @ÍÏ:@�JC�d¥�@0� êǯ21,+3�VG�H�¡=?³,4 SU_�QMe)( åMáPáPá,�UÙ,5½¢µ�dÎ;´�d>6�7+BvJ84¡�d@ SU_�QMe)( åMáMá, .�UÙBvI 97;: ëßnáMáMë9�<XH°L±M�¡�SU_�QMe)( åMáPáMë.�=� Ñ8>�JC´-@�JC�d=A=ÊBM��@h�¡¥Ã>A¥�B�ÓͳM�µBfÔx�¡@.³MÌ�³PI=�ϪäæåMáE¤8âYÙ:ѵ�¡=?=�Ñ8>�JC´>AI�JC´;�$�h�dËM>?³PI-@ÍÎ�BMII;�d ¶KÏpÎ;=ÊBMI�UJC@�>AI£³PH�+³nÑ8I % ³P=ÊBv� % Ï:@ÍJh�d¥¾F(��>AØM�·³MÌ/Jh´�d@Í�> Pá�Î=?BMI�UJC@�³P�Ͷ>AJ+³PI�·¥Ã�¡¥E¶��¡�^³MÌ�B�JC�h>AÎ=?�@ÍJCBM�.@ÍÏ:@�JC�d¥?�@*+BvËP´�B�ØvBMI SU_µQMe)( åMáPá�+.�UF0A�I�(�¦ÔBv¥ÃÎ=A��>?@�Jh´�(Î=ÊBvI�¡JB7;:�ßC1,1.$Pè� E¤+¶�Ù;Ñ8´>A°L´½´BM@8B¥�>?I>A¥EH¥ ¥�BM@Í@�³vÌÕßPF�ß�ë(JC>?¥��d@/Jh´�+¥ÃBM@Í@�³vÌ�¯MHÎ>�JC�¡�dÙ'DFExÙ:BMI �Ñ�BM@� �¡Jh�d°UJC�d �>?IÃB2 ;FG Kè$ �B�Ï % � J*Ï:Î[�³P�Ͷ>AJ^BM�h³MHI ÒB¾ßPF á�+9DIH @�JLBM�¡F+¤æ@h´³P��J � Î��¡�h>?³: p¶;>?I�BM��Ï«@ÍJCBM�^@�Ïx@�JC�¡¥J�ÖÑ8>�JC´pBÃJC³MJCBM=�¥�Bv@h@^³vÌ8ßPFK+� DIH���³P�Ͷ>AJh@�JC´>A@8´³P@ÍJ � @�JLBM�8&vÎ=ÊBvI�¡J8@�Ïx@�JC�¡¥ Ñ8>�JC´¾BÐ�h�d¥ÃBM�ͱvBv¶=AÏðd=A³P@h�(Î[�d�h>?BM@ÍJh�h³PI« >A@ÍJCBMI°d�dzMÌÕäL+¤8âM�@N$³PI�BM°L±>�åváPáKè,�¦F¿í.´�µ�¡Û��d°¡Jh@Õ³MÌ�Jh´�µ¶>AI�BM��ÏY°¡³P¥�Î�BMI>A³PIO��@8��³MIYJC´;�µÌÖ³P�h¥ÃBvJh>?³PI(³MÌ�Jh´�d@Í��Î=ÊBvI�¡Jh@�h�¡¥�Bv>?I�H;I°d=A��BM�¡Ùx�¡@hÎ[�d°d>?BM=?=�ÏÐÌÖ�h³P¥éBYJh´�d³M�h�¡Jh>?°dBM=�Î[�d�Í@hÎ[�d°UJC>AØM�MF�í.´�$@�JLBvJh>?@ÍJh>?°¡@�³MÌÅJh´��³P¶;@h�d��ØvBvJC>A³PI�BM= �BvJCB;Ù�´³nѵ�UØP�d�¡Ù/@hHËMËP�d@�J·JC´BvJǶ>?I�Bv�h>AJ*Ï£´�BM@YBMI»�UÛX�¡°¡JY³PI»Î=?BMI�UJLBM��ÏÒ¥�Bv@h@h�¡@EBMI; »³P�Ͷ>AJh@P�QpB�4¡�d´åMáPávëÙ�</ËPËP�¡I¶��¡�hËP�¡� SU_9QMe)( åMáPáMë.�UF�í.´�·�UÔx>?@�JC�dI;°d�гMÌ/JC�¡�h�Í�d@ÍJh�h>?BM= � ¥�BM@Í@+Î;=ÊBMI�UJC@+>?I z�QMTmW ]nSSRdº�SUWXRLS¶>AI�BM�ÍÏ @ÍJLBv��@�Ï:@ÍJC�¡¥Ã@��h�¡¥�Bv>?I@k³P¶;@h�d��ØvBvJC>A³PI�BM=A=AÏ�HI°d³MI@ÍJh�CBM>AI�d �F1í.´�TN$�dÎ=A�d�UQ½>A@h@h>A³PIWV¦Ù�@h�UJ�ÌÖ³M�=ÊBvHI°L´¹>?IÒ=?BvJC�ÐåváPá,1;Ù�´BM@$JC´�kÎ[³MJC�¡IKJC>ÊBv=¿JC³«Î´;³MJC³P¥��¡Jh�h>A°�BM=A=AÏ« �UJC�d°UJY<�Bv�ÍJC´ � =?>A±M�EÎ;=ÊBMI�UJC@$>AIÒ¶�³MJh´@h>AIËP=A�(BMI «¶>?IBM�ÍÏ�@ÍJLBv�9@�Ï:@ÍJC�¡¥Ã@¡Ù[BMI «Ñ8>?=?=�´�d=AΫÎ�h³nØ:>? �(@ÍH°L´p°¡³PI@ÍJh�CBM>AIKJC@dF

% ³P¥��½Jh´�d³M�h�¡Jh>?°dBM=8�h�d@Í��BM�Í°L´ ³PI Jh�d�h�Í�d@�JC�h>?BM=9Î=ÊBMI;�¡J�ÌÖ³P�h¥ÃBvJC>A³PI1>?I�¶;>?I�BM��Ï @ÍJCBM��@�Ïx@�JC�¡¥Ã@ª´�Bv@BM=A�h��Bv ;Ï£¶[�d�¡I»°�Bv�h�h>A�d ¹³PH;JdFÐí.´�ÐËP�h³nÑ.JC´~@ÍJCBMËP�kÌÖ�h³M¥'±¥ � @h>X4¡�d ¹Î=?BMI�¡Jh�d@Í>?¥ÃBM=?@^Jh³ªJC´�kÌÖ³P�Í¥�BvJh>?³PI³MÌ;Q½³:³PI � JC³�Q½BM�h@ � @h>Y4d�¡  ¶�³: >A�d@YÑ8>�JC´>AI BpËKBv@h�d³MH@E >A@h±�Ù�Ø:>ÊBp�ÍHI�B�ѵBnÏ BMI  ³M=?>?ËPBM�h°L´>A°ÃËM�h³nÑ.JC´�Ù´�BM@ö��¡�dIãIH¥��d�Í>?°dBM=?=�Ï @h>A¥EH=?BvJC�¡ 1Ñ8>�JC´ Ì�B�ØM³P�CBM¶;=?�p�Í�d@ÍH=AJh@Ã>AI JC´;�[Z梵�dIKJLBMH;�h>9¤\- ¶>AI�BM��Ï @ÍJLBv�@ÍÏ:@�JC�d¥J�]QpBM�^4�BM�Í>/BMI  % °L´;³P=?=ÕåMáPáPá.�9BMI ÒJC´;�_5 ¢µ�¡Î´�d>/¶;>?I�BM��Ï'&vËP>ÊBvIJ � Î=?BMI�UJ^@�Ïx@�JC�¡¥ ��í.´�¡¶�BMH=�J

`ba@c^ced�d�def ghcji�kKcjlSf mnlponf qrmsa]m�f tsuwv

Page 3: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ì Yì

SU_ÇQMe)( åMáPávë �UF��*I �dBM°L´ °�BM@Í�MÙ/JC´;�-°d³P¥·¶>?I�¡  �¡Û��d°UJC@k³MÌ.Jh´�ª@ÍJh�d=?=?BM�ÇÎ��¡�ÍJCH;�h¶�BvJh>?³PI;@kBMI  ËKBv@· �hBMË=?�dBM ¹JC³¾Î��¡�h>ÊBv@ÍJC�ͳPI�BM=?>AËPI¥��dIKJ(³M̵Jh´��Î=ÊBMI;�¡JC�¡@h>A¥�BM=�Î�³PÎ;H=ÊBvJh>?³PIXÙ�JC´�¡�h�d¶KÏ~�h�¡ H°¡>?I˾JC´���h�¡=ÊBvJh>AØP�BMI  °¡³P=?=A>?@Í>?³PI�Bv=�ØP�¡=?³:°d>AJh>?�¡@·BMI;  >?I°¡�h��Bv@h>?I;˽JC´;�-Î=ÊBvI�¡Jh�d@h>A¥�Bv=�Bv°d°d�Í�¡Jh>?³PI �UÚ�°d>?�¡I°¡Ï�Ñ8>AJh´>?I ä åxF è¤8â ³MÌ�JC´�k°¡�dIKJC�hBM=Õ@�JLBM�¡F·í.´�¡¶�BMH=�J SU_^QMe)( �VåváPá,+.�.ÌÖH�ÍJh´�d�$�¦ÔBv¥Ã>AI�d ÒJC´;>?@�@�JLBMËP�k³vÌ�Î;=ÊBMI�UJC�¡@h>?¥ÃBM=ËP�ͳ�Ñ.Jh´£>?I½¶>?IBM�ÍÏ«@�JLBM�+@ÍÏ:@ÍJh�d¥�@^Ñ8>AJh´p@ÍJh�d=A=ÊBM�9@h�¡Î�BM�CBfJC>?³MI@��Ý�� èvá�¤8âyBMI; £�d°¡°d�dIKJh�h>?°¡>AJh>?�d@��nÝ�á;F�;F��*I«BM ; >AJh>?³PI�JC³·Jh´�� �BM¥�Î>AIËE³MÌ�@Í�d°dH;=ÊBM��Î��¡�ÍJCH;�h¶�BvJh>?³PI;@�³PI-Î=?BMI�UJC�d@Í>?¥ÃBM=?@�>?IÃJC´��Î;�h�d@Í�dI°¡�$³MÌËKBM@+ �CBvËÙ�Jh´�¡Ï¾ÌÖ³PHI ½JC´�BvJ+JC´�·�¡ØP³M=?H;Jh>?³PI½>?@^´;>?ËP´=�Ï«@h�¡I@h>�JC>AØM�·JC³ÃJC´�E>AI>AJh>ÊBM=X@h>X4¡� �  >?@�JC�h>A¶H;Jh>?³PI¾³MÌJC´;�+¶[³x ;>?�d@�>AIÐJh´�9 >?@ͱ[ÙxBMI �¶>AI�BM�ÍÏE@ÍÏ:@ÍJh�d¥�@�Ñ8>AJh´ �nÝ�� á(°�BvI�>?I;´>?¶>�J/�hH;I�B�Ñ�B�ÏÃBM°d°¡�h�UJC>?³MI�Ñ8>�JC´>AIBk >?@ͱ-³MÌ¿HI� � HBM= � @h>X4¡�d ¾Î=ÊBvI�¡Jh�d@h>A¥�Bv=?@dF

í.´�P"I�BM=�@ÍJCBMËP�d@·³MÌ�JC�¡�h�Í�d@ÍJh�h>?BM=�Î=ÊBMI;�¡JÇÌÖ³P�h¥ÃBvJC>A³PI � ÌÖ�ͳP¥6Î=?BMI�¡JCBM�ÍϹ�¡¥E¶��ÏP³P@·Jh³pÎ=?BMI�UJC@ �´�B�ØP�·¶��¡�dIÒ¥�³x �¡=?�¡ ½ÌÖ³P�#Z㢵�dIKJCBMH�h>¿¤\-^Ù�JC´;�E°d=A³P@h�¡@ÍJ$¶>AI�BM��Ï«@ÍJLBv�^@ÍÏ:@�JC�d¥ JC³ÃJh´� % H;I �-�BM�Ͷ>?�¡�h>SU_8QMe)( åváPáKåxÙ�G�H>?IKJCBMI�B SU_.QMe)( åMáPáKåxÙ�í�H�h�Í>?I> SU_8QMe)( åMáPáKè,�¦F8í.´�ÐêÇåÐ@�JLBM�#Z�¢µ�¡IÒ¤ ��ßMFAß_DIH��+BvI JC´;� Nkߪ@ÍJLBv� Zࢵ�¡I - ��á;F�;ß DIH��YBM�h�-¶[³PHI;  Ñ8>AJC´ B½@ÍJC�¡=?=?BM�·@Í�dÎ�BM�hBvJC>A³PI ³MÌ��Ý ä'å� ;F 룤8âYÙ�B¶>AI�BM�ÍϹ�¡°d°¡�dIKJC�Í>?°d>�J*Ï��nÝ ä á;F èPåxÙ�BMI �´�B�ØP�ªB¾@ÍJC�¡=?=?BM�(Î��¡�h>ÊBv@ÍJC�ͳPI~Ü�Ý����:Ý���ß����nÝ��Çä6ßPßPF 嫤8âÇFD�BM�Í>?³PH@Ç >A@h±¹¥�Bv@h@· ;>?@ÍJh�h>A¶H;JC>A³PI@ÇBM�ͳPHI  Z7¢µ�dI ¤�ѵ�¡�h�-�¦ÔBv¥Ã>AI�d �>?IF-µBM�h¶>A�d�Í> SU_(QMe)( �VåMáPáPå,�UÙBMI «JC�¡�h�Í�d@ÍJh�h>?BM=�Î=?BMI�¡Jh@�ÌÖ³P�h¥��d «>AI«Jh´�d>A�.@h>A¥EH=ÊBfJC>?³MI@�Ñ8>�JC´«@h�¡¥Ã>A¥�B�ÓͳM�.BfÔx�d@.Ñ8>AJh´>?I¾ä ßMFK+k¤8â ³MÌZ ¢µ�dI~¤·F�G�H>AIKJLBMI�B SU_^QMe)( �VåMáPáPå,�+Î[�d�ÍÌÖ³M�h¥��d  , -@h>A¥EH=?BvJC>A³PI@^H;@h>?I;Ë«Ø:>A�ÍJCHBM=?=�ϽJh´�Ð@CBM¥��k>?I>�JC>?BM= >A@h±Ð¥�Bv@h@µ ;>?@ÍJh�h>A¶H;JC>A³PI �ÖJC´;��� ¶>?¥�³x BM=��P¥�³: �d=�JC´�BfJµ>A@µH@Í�d ª>?I�JC´�+@h>A¥EH=ÊBfJC>?³MI@�Î�h�¡@h�dIKJh�d «>?I�JC´>A@BM��JC>?°¡=?�C�UÙ�BMI ~�UÔ;BM¥�>?I;�d �B«�hBMIËP�гM̵>?I>�JC>?BM=¿ ;>?@h±p>?I°¡=?>?IBvJC>A³PI@>��áªJh³ +Má��YBvI »Bv=?@h³¹ß�1Má��w���h�¡=ÊBvJh>AØP�JC³¹JC´;�½¶>AI�BM��Ï ³P�h¶;>AJLBv=�Î=ÊBvI�ªÌÖ³P��B~ >A@h± °¡�dIKJC�¡�h�¡  BM�h³PH;I  Z ¢µ�¡I�¤·Ù�BMI;  Î[�d��ÌÖ³P�h¥��d  B~@Í�¡JóMÌ@h>A¥EH=?BvJC>A³PI@�Ñ8>AJh´ Bp ;>?@h±Ò°¡�dIKJC�¡�h�¡  Bv�h³PHI; FZࢵ�¡I -y°¡³PÎ=ÊBvI�BM�$JC³¾JC´�Ã@ÍJC�¡=?=?BM�Y³M�h¶>�J�F«���h³P¥ -ìè-JC�d�Í�h�¡@ÍJC�Í>ÊBM=�Î=ÊBMI;�¡JC@$ÌÖ³P�Í¥Ã�¡ ~BM�h³PH;I IZ"¢µ�¡I�¤é>?I~@h>A¥EH=?BvJC>A³PI@+ÌÖ³M��Ñ8´>?°L´~JC´�Ð¥�>? Î=?BMI�E³v̵JC´;� >A@h±½ÑµBM@Ç>?I>�JC>?BM=?=�Ϫ>?I°¡=?>AI�d Ò¶KÏ� Pá��(³M�$=?�d@Í@(�h�d=?BvJC>�ØP�·Jh³ªJC´�Ð@ÍJh�d=A=ÊBM��³M�h¶>�JU�VG�H>AIJCBMI�B SU_+QMe)( åváPáKåxÙG�H>?IKJCBMI�B åváPáMë �¦Ù�BMI  ÌÖ�h³P¥ åpì�è~Î=?BMI�UJC@ÐÌÖ³P�h¥��d �BM�h³PH;I  Z梵�dI - �aG�H>?IKJLBvI�B»åváPá, .�¦F ��³P�°d³M¥ÃÎ�Bv�h>?@ͳPI�Ù�ËP�ͳ�Ñ.Jh´ ÌÖ�ͳP¥ Jh´�½@hBM¥��¾>AI>AJh>ÊBM=� >A@h± Î=?BM°d�¡ �Bv�h³PHI; 1Jh´� % HI Ñ8>AJC´1I�¡>AJC´;�d�ÐËP>ÊBvIJÎ=?BMI�¡Jh@ÐI³P��BÒ@ÍJC�¡=?=?BM�k°d³P¥�Î�BMI;>?³PI Î[�d��JCH�Ͷ>?IËÒJh´�½@�Ï:@ÍJC�¡¥ Ñ�BM@Ð@Í>?¥EH=?BvJC�¡  ¶Ï G�H>AIKJLBMI�B SU_YQMe)(�VåváPáKå,�¦F QpBvJh�d�Í>ÊBM=Å�Í�d¥ÃBM>?I�¡ ¾Ì�Bv�ÍJC´;�d�8ÌÖ�h³P¥ Jh´� % HI�Ù�BMI pBM°d°¡�h�¡Jh>?³PI«ÑµBM@^¥EH;°L´p@h=A³nѵ�¡� �Vä×ß·ê$Ï:�8�°d³M¥ÃÎ�Bv�h�d ¾Ñ8>AJh´½JC´;�·BvÌÖ³M�h�d¥��dIKJh>?³PI�¡ [Z1¢µ�dIp¤\-7>AIJh�dËP�hBvJC>A³PI@2�VäéåMáMá9Q¾Ï:�w�8BMI p@h>?¥·H=ÊBvJh>?³PI;@�³MÌJC´;� % HI � ¯MHÎ>AJh�d� � % BvJhH�hI @�Ï:@ÍJC�¡¥ �Vä ßnèMá¾ì åMáPá�Q¾Ï:�8�UÙ�BM=?=�³MÌ8Ñ8´>?°L´ ¶[�dËKBMI Ñ8>�JC´ Ø:>?��JCH�BM=A=AϹJC´;�@CBv¥Ã�+>?I>�JC>ÊBv=� >?@ͱ �a¢µ´�BM¥E¶[�d�Í@8åMáPáxßPÙG�H>AIKJLBMI�B�� ²Å>A@h@CBvH�d�8åváPá,+.�¦F�í.´�¡@h�(@h>A¥EH=ÊBfJC>?³MI@�@h´³nÑ JC´�BfJËP>?BMIKJ·BvI »@�JC�d=A=ÊBM�$°¡³P¥�Î�BMI>A³PI@(I³MJdzPI=�Ï£JC�ÍHI°dBvJC��JC´�� >?@ͱ�Ù�¶H;JY´�BM@�JC�¡I�JC´;��BM°¡°d�Í�¡JC>A³PI»Î;�h³:°d�d@Í@¶KÏ1@ÍJC>A�h�Í>?I˹HÎ JC´�½Î=ÊBvI�¡JCBM�ÍÏ �¡¥E¶��ÏP³P@ÐJC³�´>?ËP´;�d�Ð�d°¡°d�dIKJh�h>?°¡>AJh>?�d@ÃBMI 1>?I;°d=?>AI�BvJh>?³PI@¡F *+B�Ï:¥Ã³MI SU_ÇQMe)( �VåváPáMë �(�UÔxÎ=?³M�h�d  Jh�d�h�Í�d@�JC�h>?BM=µÎ;=ÊBMI�UJEËP�ͳnÑ.JC´1BM�h³MHI  B % H;I � =A>?±M��@ÍJLBv�·Ñ8>AJh´ BÒ¯MHÎ>�JC�d� � =A>?±M�Î=?BMI�¡J+>?I½B�Ñ8>A �Ç�CBMIËM�Y³MÌ�>?I>�JC>?BM=X°¡³PI'"�ËPH;�CBvJh>?³PI@ ��¥ÃBM@Í@h�d@^BMI ½³P�h¶>�JC@8�UÙ[BMI ½ �d¥�³PI@�JC�CBfJC�d ¾JC´�BfJBMIk�¡°d°d�¡IKJC�h>A°9¯MHÎ>�JC�d��°d=?�dBM�h@¿³PH;J/¥ÃBvJh�d�h>?BM=>?IEJh´�.BM@�JC�d�ͳP>? ·�h�dËM>?³PIE¥·H°L´kÌ�BM@ÍJh�d��Jh´�BMIÐB�ËP>?BMIKJ�Î=?BMI�UJ³PI¾Bаd>?�Í°dH=?BM��³P�Ͷ>AJdF

í.´�9ÌÖ³P�h¥ÃBvJC>A³PIk³MÌ�Î=ÊBvI�¡Jh@�>AIÃ@ͳ � °dBM=?=A�d  � � J*Ï:Î��9³P�Ͷ>AJh@�Ñ8´;>?°L´��¡I°d>A�h°¡=?�8¶�³vJC´�@ÍJLBv�h@�³MÌÅB(¶>?IBM�ÍÏ

Page 4: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ì-ë·ì

@ÍJCBM�ª@ÍÏ:@�JC�d¥ ´BM@«BM=?@ͳ ¶[�d�dI">?IKØM�d@ÍJh>?ËKBfJC�d XF��+�¡=?@ͳPI�� �¿BMÎ�BM=A³P>X4¡³PH �VåMáMá, .�ÃBvI ��+�d=A@h³PI �aåMáPá, .�@ÍJhH >A�d ªJC´�$�UÛX�¡°¡Jh@9³vÌ�BkËP>?BMIKJ�Î�ͳMJC³MÎ=ÊBMI;�¡J�Ñ8>�JC´>AI«B·Øx>A@h°¡³PH@8°d>A�h°dH;¥E¶>?IBM�ÍÏ� >A@h± �mÑ8>AJh´-JC´��Jh³MJLBM=¥ÃBM@h@гMÌ+JC´�¾@ÍJCBM�h@ÃBMI  JC´�¾Î�ͳMJC³PÎ;=ÊBMI�UJ�� � H�BM=.JC³1ß DIH��UÙµBMI 1ÌÖ³PHI 1¥Ã³: �¡@�³vÌ��¡ØM³P=?HxJC>?³MI >AIÑ8´>A°L´EJC´��Î;�h³MJh³PÎ=ÊBvI�¡J¿°�BMIk�Í�d¥ÃBM>?IY>?IY@ÍJLBv¶=?��³M�h¶>�JC@dÙv�¡ØM�dI�BM�h³MHI E�¡°d°d�¡IKJC�h>A°.¶>?IBM�ÍÏÇ@ÍJCBM��@�Ï:@ÍJC�¡¥Ã@¡Fí.´�>"�I�BM=/@�JLBMËM�d@dzMÌ�Jh�d�Í�h�d@�JC�Í>ÊBM=/Î=?BMI�UJÇÌÖ³M�h¥ÃBvJC>A³PI£´�B�ØP��¶[�d�dI�IH¥Ã�¡�h>A°�BM=A=AϽ@h>?¥·H=ÊBvJh�d ¹>?I � � J*Ï:Î[�°d>A�h°¡H¥E¶>AI�BM�ÍÏ~³P�Ͷ>AJh@EBM�ͳPHI  ¶;>?I�BM��Ï~@ÍJLBv�h@EÑ8>AJh´ BpJC³vJLBM=�¥�Bv@h@E³MÌ(ß DIHÕÙ/@h�¡¥Ã>A¥�B�ÓͳM�·BfÔx�¡@Ðá;F áPè¤8â � �Ý � á;F ë~¤8âYÙ�BMI ã¶>AI�BM��Ï �d°¡°d�dIKJh�h>?°¡>AJh>?�d@ �nÝ � á;FG1 �VG�H>AIKJLBMI�B�åMáPávëÙ�²Å>?@Í@CBMH;�d� SU_·QMe)(åMáPávëÙ¿G$H;>?IKJLBMIB � ²�>A@h@hBMH�d�·åMáPá�+.�UFÐí.´�¡@h��@Í>?¥EH;=ÊBvJh>?³PI@^¶��¡ËKBMI¹Ñ8>AJC´¹JC´;��@hBM¥���¶;>?¥�³x �Bv=Õ>?I>�JC>?BM= >A@h± ¥ÃBM@h@Р>A@ÍJC�Í>?¶HxJC>?³MI Bv@ÐJh´�¾¥Ã³: �d=.H;@h�d �>?I JC´>A@�BM�ÍJh>?°d=A�MÙ�BMI 1JC´� "�I�BM=.Î;=ÊBMI�UJLBM��Ï @ÍÏ:@�JC�d¥�@Ñ��d�h�Ð@�JLBvJh>?@ÍJh>?°dBM=?=�Ϫ°d³P¥�Î�BM�Í�d £Jh³ªÎ=ÊBMI;�¡JLBv�ÍϽ@ÍÏ:@ÍJh�d¥�@(ÌÖ³M�h¥��d £>AI£JC´� % HI � ¯MH;Î>AJh�d� � % BvJhH�hIÒ@�Ïx@�JC�¡¥�ÖÑ8´;>?°L´»H;@h�d ~JC´�Ð@hBM¥Ã�Ð@�JLBM��JC>?I;˾ ;>?@h±Ò°¡³PI >�JC>A³PI@w�¦FÐí¿�¡�h�h�¡@ÍJh�h>ÊBv=/Î=ÊBMI;�¡JC@(@Í>?¥�>?=ÊBv�+JC³ªJh´³P@h��>?I¹JC´;�% ³P=?BM� % Ï:@ÍJh�d¥ ÌÖ³P�h¥��d �BM�h³MHI �¶;>?I�BM��Ïk@ÍJCBM�h@�Ñ8>AJh´�BMÎBM@ÍJh�CB��ÇÝ � �Ý���ß�� �nÝ���ç á;F åǤ8âÇÙÑ8´;�d�h�dBM@@h>A¥EH=?BvJC>A³PI@�³vÌ�¶;>?I�BM�Í>?�¡@�Ñ8>AJh´�=?BM�hËM�d�Õ¥ÃBfÔx>?¥EH;¥ @Í�dÎ�Bv�CBvJh>?³PI@/�Í�d@ÍH=AJh�d �>?IEÌÖ�¡Ñ��d��Î=?BMI�UJC@dÙK�¡@hÎ[�d°¡>ÊBM=A=AÏ>?IKJh�d�h>A³P��Jh³Ãß8¤8â ³MÌ�Jh´�8¶>?IBM�ÍÏk@�JLBM�/°¡�dIKJC�¡�µ³MÌ�¥ÃBM@h@¡Fe7+�¡�h�d>AI�ÙKѵ�8³PI;=AÏk°¡³PI@h>A �d�/Jh�d�h�Í�d@�JC�h>?BM=Î=?BMI�UJÌÖ³P�Í¥�BvJh>?³PI BM�h³PH;I �B¹@h>AIËP=A�ª¥�BM>AI @h� � H;�dI°¡�£@ÍJCBM�kÑ8>AJC´1B¹@ÍJh�d=?=?BM�k°d³M¥ÃÎ�BvI>?³PIXÙ�BvI �Bv>?¥ Jh³ "�I @h>A¥Ã>A=ÊBM�^°d³PI@�JC�hBM>?IKJC@Y³PI»Jh´��@�JC�d=A=ÊBM�(¥ÃBM@h@Í�d@·BMI  ³P�Ͷ>AJh@ÇJh´�BvJ·BM=?=A³nÑyJC´;�ÃÌÖ³P�Í¥�BvJh>?³PI¹³M̵JC�d�Í�h�¡@ÍJC�Í>ÊBM=Î=?BMI�¡Jh@8@h>?¥�>?=?BM��JC³kJC´�2Q½�¡�h°¡H�ÍÏ � D��¡IH@ � <�Bv�ÍJC´ � QpBM�Í@^@�Ïx@�JC�¡¥½F

¤ �h�¡=ÊBvJh�d ¾>?@h@ÍH�(>?@�Jh´�BvJ9³MÌ�JC´�Ç=?³PI;ËEJC�d�Í¥ @ÍJCBM¶>?=A>AJ*ÏóMÌ¿Î=ÊBMI;�¡JLBv�ÍϪ@�Ïx@�JC�¡¥Ã@9>?I«¶>AI�BM�h>A�d@ ��BvÌmJC�¡�Î=?BMI�¡J(ÌÖ³P�Í¥�BfJC>?³MIÒ´�BM@(¶��¡�dI °¡³P¥�Î=?�UJC�d  �UFÐÉ >?�dËM�d�ÍJ�� 79³P=?¥ÃBMI ��ß �.$,���¦ÔBv¥Ã>AI�d ¹JC�¡@ÍJYÎ�BM�ÍJh>?°¡=?�d@BM�ͳPHI �³PI�+BMI Ã¶�³MJh´Ã@�JLBM�Í@�>AI�Jh´�/Z~¢µ�dI-¤#-1@�Ïx@�JC�¡¥½Ù;BMI 37+³P=A¥�BMI � É >A�dËP�¡�ÍJ#��ß ��.�Õ�UÔxÎ=A³P�h�¡ JC´;�£@ÍJCBM¶>?=A>AJ*Ï ³MÌdzP�Ͷ>AJh@�>AI BMI  BM�ͳPHI  ��B�Ñ8>? ;�£�CBMI;ËP�£³MÌ8��¶>AI�BM��Ï�@�JLBM�-@�Ï:@ÍJC�¡¥Ã@¡Fæí.´;�d@h�£J*Ñ�³@ÍJhH >A�d@Õ �¡¥Ã³MI@ÍJh�CBvJh�d ·Jh´�BvJ�Jh´�µ@�JLBM¶;>?=?>�J*Ï(�h�¡ËP>?³PI;@�BM�Í�µ �¡Î��¡I �¡IJ�³MI·ÌÖ³PH�¿Î�BM�CBv¥Ã�UJC�d�Í@���JC´��¶>?IBM�ÍÏ@h�¡¥Ã>A¥�BnÓͳP��BfÔx>?@ �Ý/ÙvJC´;��¶>AI�BM��Ï$�d°¡°d�dIKJh�h>?°¡>AJ*Ï��nÝ/ÙfJh´��>?I°¡=?>?IBvJC>A³PI$³MÌ;Jh´�� >?@ͱ$�h�d=?BvJC>�ØP�/JC³8JC´;��@�JC�d=A=ÊBM�³P�Ͷ>AJdÙ�BMI «JC´�(@�JC�d=A=ÊBM�µ¥�BM@Í@8�CBvJh>?³ � D��� �D���� D��O�UÙxÑ8´�d�Í�_D��$>?@�Jh´�(¥�BM@Í@8³MÌ¿Jh´�(Î�h>A¥�Bv�ÍÏ@ÍJCBM�ÇBMI ID�� >A@�JC´��¥ÃBM@h@(³MÌ�JC´�аd³M¥ÃÎ�BvI>?³PIXF3:^Ï:I�Bv¥Ã>A°�BM=¿@ÍJLBv¶>?=A>AJ*Ï£°dBM=?°¡H=ÊBfJC>?³MI@�³M̵BMI�<�Bv�ÍJC´ �=?>A±M�kÎ=?BMI�UJY³M�h¶>�JC>?I;Ë«B % ³P=ÊBM� � ¥ÃBM@h@U�DIH���@ÍJCBM�$Ñ8>AJh´»BMI¹>AIJh�d�Í¥Ã�¡ >ÊBvJh�k¥�Bv@h@(°d³P¥�Î�BMI;>?³PI �]D����á;F áPá;ßÃì á;F è�DIH��·´�B�ØP�«@Í´³nÑ8I JC´BvJkJC´�ª�Í�dËP>A³PI@k³MÌ9@�JLBM¶>A=?>�J*Ï» �¡Î��¡I 1¥Ã³P@�Jk@h�¡I@h>�JC>�ØP�d=�Ï ³PI JC´;�¶>AI�BM�ÍÏ~Î[�d�Í>ÊBM@�JC�h³MI Ü�Ý � �Ý���ß � �nÝ��UÙ�ÌÖ³M�EBpËP>�ØP�¡I °d³P¥�Î�BMI>A³PI»¥ÃBM@Í@ D�� �@:$BnØ:>A  SU_(QMe)( åMáPá� .�UFí.´�¡@h�$@ÍJCBM¶>A=?>AJ*ÏаdBM=?°¡H=ÊBfJC>?³MI@dÙ>?Iðd³PI�ÓÍHI°¡Jh>?³PIÃÑ8>AJC´ÃJC´��³M¶@h�¡�ÍØP�¡ « >?@�JC�h>A¶H;Jh>?³PI@�³MÌ�¶>AI�BM��ÏóM�h¶>�JLBM=Î�BM�hBM¥��¡JC�¡�h@ �@:�H � H�dII;³�Ï � QpB�ÏP³M�~ß �;ß��¦Ù+>AI >?°dBvJC�½JC´�BvJ«ä èMá�� ³vÌ·Bv=?=^¶;>?I�BM��Ïã@�Ïx@�JC�¡¥Ã@¾BM�Í�Ñ8>? ;�k�dI³PH;ËP´�@ͳ¾Jh´�BvJÇ<�BM��JC´ � =?>?±v�kÎ=ÊBvI�¡Jh@$°�BMI~�h�¡¥�BM>AIÒ@ÍJCBM¶=?�EÌÖ³M��JC´��BMËP�k³vÌ�Jh´� % ³P=ÊBv� % Ï:@ÍJh�d¥¾F¤^ ; >AJh>?³PI�Bv=?=AÏMÙ�@h>A¥Ã>A=ÊBM�аdBM=?°¡H=ÊBvJh>?³PI;@�³MÌǶ[³x >A�d@->AIã°d>A�h°¡H¥E¶>AI�BM�ÍÏ ³P�Ͷ>AJh@��VG�H>AIJCBMI�B � ²Å>?@h@hBMH�¡�åMáPá�+.�UÙ�Bv=?³PIËEÑ8>�JC´ªJC´;�dzM¶@h�¡�ÍØP�¡ £¶>AI�BM�ÍÏ�Î��¡�h>A³x « >A@ÍJC�Í>?¶HxJC>?³MI �:$B�Ø:>?  SU_.QMe)( åMáPá� .�UÙ>AI >A°�BvJh�^JC´�BfJBMÎÎ;�h³�Ôx>?¥ÃBvJC�¡=AÏÃßná�� ³MÌX¥ÃBM>AIE@h� � H;�dI°¡�+¶>AI�BM��ÏE@ÍJCBM�h@�Bv�h�.°d=A³P@h�.�¡I³PHËM´ÐJh³(��BM°L´�³MJC´;�d�ÕJC³(Bv=?=?³nÑ JC´;�ÌÖ³P�Í¥�BvJh>?³PIÃBMI «=A³PIË � JC�d�Í¥ @ÍJCBM¶>?=A>AJ*Ï�³MÌ�<�BM��JC´ � =?>?±v�^Î=?BMI�UJC@dF�A�I�^ËP³KBM=�³MÌÅJC´>A@�Î�BMÎ[�d�µ>?@�Jh³kÎ�h³nØ:>? ;�BMIªBvI�BM=?³MËP³PH@�°d³MI@ÍJh�CBM>AIJ�ÌÖ³P��Î=ÊBMI;�¡J §�bf`¦z�QM_�TVbfW BM�h³PH;I ->?I; >AØ:>? ;H�BM=�@ÍJCBM�h@µ>?I�¶;>?I�BM��ÏÐ@ÍÏ:@ÍJh�d¥�@dÙ>aF �vFAÙ"�I  Jh´�ÃÌÖ�hBM°¡Jh>?³PI�³MÌ8¶>AI�BM�h>A�d@(JC´�BfJkBM=A=?³nÑ ÌÖ³P�·BMI �dIKJh>?�h�Ã@ÍÏ:@ÍJh�d¥ ³MÌ.JC�¡�h�h�¡@ÍJh�h>ÊBv=�Î=?BMI�UJC@YJh³pÌÖ³P�Í¥½F

Page 5: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ì«èÇì

��³P�/JC´�9@CBv±M�^³vÌ� �s"�I>AJh�dI�¡@h@¡ÙxÑ�� ��@ͳP¥��¡Ñ8´�BvJµBM�Ͷ>AJh�CBM�Í>?=AÏ'�� �h"�I;��B���°d³P¥�Î=?�UJC���(Jh�d�Í�h�d@�JC�Í>ÊBM=�Î=?BMI�UJ@ÍÏ:@�JC�d¥6Jh³¾¶[�k³PI�kJh´�BvJÇ�UÔ:JC�¡I @dzPH;J(JC³¾BvJ(=A��BM@�J$JC´�ÐÎ�Í�d@Í�dIKJ·³M�h¶>�J(³MÌ Q½BM�h@¡Ù�ä ßMF è-¤8âYÙ�Ñ8´;>?°L´�dI;°d³P¥�Î�BM@Í@h�[email protected]´��>?I;I�d�µJh�d�Í�h�d@�JC�Í>ÊBM=�Î=ÊBMI;�¡JC@µ>?I�Jh´� % ³P=?BM� % Ïx@�JC�¡¥ BMI «BM=A@h³·Jh´��´�Bv¶>AJCBM¶=?�;4d³PI;��³MÌ% HI � =?>A±M�$@�JLBM�Í@ �@N(BM@ÍJh>?IË SU_µQMe)( ß �, .�UF

�*I�Jh´>?@�BM�ÍJh>?°¡=?�MÙKÑ��^Î�Í�d@Í�dIKJ�JC´;�^�h�¡@hH=�JC@�ÌÖ�h³P¥�BY=?BM�hËM�9@ÍH�ÍØM�¡Ï �Vä ß�åMá(I:H;¥Ã�¡�h>?°dBM=�@h>A¥EH=ÊBfJC>?³MI@w�³PI«JC´�(�UÛX�¡°¡JC@+³MÌ�B�@�JC�d=A=ÊBM�µ°d³P¥�Î�BMI>A³PI«³PI«JC´��"�I�Bv=Å@ÍJLBvËP�d@9³MÌ�JC�d�Í�h�¡@ÍJC�Í>ÊBM=ÅÎ;=ÊBMI�UJ8ÌÖ³P�h¥ÃBvJC>A³PI->AI % �J*Ï:Î���³P�h¶;>AJC@�BM�ͳPHI Ç³PI��°d³M¥ÃÎ[³PI�¡IJ¿³MÌB9¥ÃBM>?I(@Í� � H�dI;°d�.¶>AI�BM�ÍÏ�@ÍJLBv�¿@�Ïx@�JC�¡¥½F�É»���UÔ;BM¥�>?I��@�JC�d=A=ÊBM�¥ÃBM@h@��CBvJh>?³P@�³MÌ �7ß�& ;Ùxß�&PåxÙvBMI kå�&� _�mÌÖ³P��@ÍJLBv�h@¿Ñ8>�JC´Ç¥�Bv@h@h�¡@�³MÌ�d>AJh´�d�¿á;F è;D H�³P��ß DIHO�¦ÙMBvI ·JC´;�@ÍJh�d=A=ÊBM�¿³P�h¶>�JLBM=xÎ�BM�hBM¥Ã�UJC�¡�h@/� �ÝÕÙ �nÝ��ÕBM�Í��ØMBv�h>?�¡ k@hH°L´ÐJC´BvJÕJC´;�9@�Ï:@ÍJC�¡¥Ã@/JCBM±M�.³PIÐÎ[�d�Í>ÊBM@�JC�h³MIEØMBv=?H�¡@³MÌ[Ü�Ý �7èxÙ $:F èxÙK³M��ßná$¤8âYF Q¾H=AJh>?Î=A��@h>A¥EH=ÊBfJC>?³MI@dÙfH@hHBM=?=�Ï ^JC³ÐßnáxÙBM�h�.Î[�d��ÌÖ³P�h¥��d EÌÖ³P����BM°L´�¶>?IBM�ÍÏ@ÍJCBM�/@ÍÏ:@�JC�d¥æÑ8>AJC´Ð@Í=?>?ËM´J�°L´�BMIËM�d@�>?IEJh´�.@ÍJCBM�ÍJh>?IË$@�JLBvJh�d@�>?Ik³P�Í �d�¿JC³(�UÔxÎ=A³P�h��Jh´�.@h�¡I@h>�JC>AØ:>�J*Ï·³MÌ[JC´;�Î=?BMI�¡J�ÌÖ³P�Í¥�BvJh>?³PIÐÎ�ͳx°¡�d@Í@µJC³·Jh´�^>AI>AJh>ÊBM=;°d³PI ;>AJC>A³PI@¡F��*I-³PI�+°�BM@Í�MÙ:ѵ��Î[�d��ÌÖ³P�h¥��d P PáY>AIKJC�dËM�CBvJh>?³PI@³MÌ^B~@Í>?IËM=?�-@�Ïx@�JC�¡¥ �mÑ8>AJh´1ÜdÝ � $xF 裤8âYÙ �Ý �!ßná~¤8âÇÙ�BMI �nÝ � áxF åPè��YJC³¹Î�h³: H°¡�pBÒ=?BM�hËP� >A@ÍJC�Í>?¶HxJC>?³MIÒ³MÌ "�IBM=�Î=ÊBMI;�¡JLBv�ÍÏÒ@�Ïx@�JC�¡¥Ã@Y>?I¹³P�h ;�d�(JC³ � HBMIKJC>AÌmÏpJC´>A@Ç°L´BM³MJC>A°Ã�UÛX�¡°¡JdF�í.´>A@YÎ�BvÎ��¡�>?@8³P�ÍËKBMI>Y4d�¡ pBM@8ÌÖ³P=A=?³nÑ8@dF�í.´�·³M�h¶>�JLBM=�@�JLBM¶;>?=?>�J*Ï-³MÌ�JC�d@�J^ÎBM�ÍJh>?°d=A�d@8>?I % � J*Ï:Î��Y³P�h¶>�JC@8>?I¾¶>AI�BM�ÍÏ-@ÍJLBv�@ÍÏ:@�JC�d¥�@�>A@+ >A@h°¡H@h@Í�d Ò>?I��UåxF8í.´�YI:H;¥Ã�¡�h>?°dBM=�¥Ã³: �¡=¿BvI p>AI>AJh>ÊBM=�°¡³PI >�JC>A³PI@9BM�h�YÎ�h�¡@h�¡IJh�d Ò>AI��n ;ÙBMI  �Í�d@ÍH=AJh@E³MÌ8³PH�·Î=ÊBMI;�¡JLBv�ÍÏ�BM°d°¡�h�UJC>?³MI @h>?¥·H=ÊBvJh>?³PI;@YBv�h�-Î�Í�d@Í�dIKJC�¡ �BMI;   >?@Í°dH@Í@h�d  >AI��LëFÒÉ��°d³MI°d=AH �(>?I��Uè·Ñ8>AJh´pBk@ÍH¥Ã¥ÃBM��Ï-³MÌ¿³PH�.�Í�d@hH;=AJC@9BMI; ¾Jh´�d>A�.>?¥�Î=?>A°�BvJh>?³PI@¡F

� >���6� �� ��  �� ��6���� ���

�/�h>A³P�^JC³«�¦ÔBv¥Ã>AI>?I˪Î;=ÊBMI�UJLBM��ÏÒBM°¡°d�Í�¡JC>A³PI¹>?IÒ¶>AI�BM�Í>?�d@¡Ù�ѵ�ж�Í>?���ÏÒ°d³MI@h>A �d��Jh´�Ð@ÍJLBv¶>?=A>AJ*Ͼ³MÌJC�¡@ÍJ·Î�BM�ÍJh>?°¡=?�d@(>AI�JC´;��¶>AI�BM�ÍÏ£@ÍÏ:@ÍJh�d¥�@E³MÌ.>AIJh�d�Í�d@ÍJdF �*I BMÎÎ�ͳ�Ô;>A¥�BfJC�kJC�¡�h¥�@dÙ�>�Ì.B¾¶>?I�Bv�ÍϹ>?@(Ñ8>? ;��dI;³PHËP´½@h³ÃJh´�BvJ9JC�¡@ÍJ�ÎBM�ÍJh>?°d=A�d@8>?I¾³P�Ͷ>AJ9BM¶[³PH;J9JC´;�YÎ�Í>?¥ÃBM�ÍÏ-�h�d¥ÃBM>AI¾=?BM�hËM�d=AÏ�HIÎ[�d��JCH�Ͷ��¡ £³nØP�d�^BJC>A¥Ã��@hÎ�BvI�³vÌ�äyß�áPá Q¾Ï:�/��°L´�Bv�CBM°UJC�d�Í>?@�JC>?°µ³MÌ�JC�d�Í�h�¡@ÍJC�Í>ÊBM=xÎ=ÊBvI�¡JÕÌÖ³M�h¥ÃBvJC>A³PI��UÙf³PI��Ñ�³PH=A kI³MJ��¦Ô;Î[�d°UJJC´;�ö>AI�BM��Ï£JC³½´�B�ØP�ÃB½=ÊBv�hËP�k>A¥ÃÎ�Bv°¡J(³PI�Î=ÊBMI;�¡J(ÌÖ³P�h¥ÃBvJh>?³PI�FÐí.´�Ã�h�¡ËP>?³PI;@dzvÌ�³P�Ͷ>AJCBM=Õ@ÍJCBM¶>A=?>AJ*Ïp³MÌÎ=?BMI�¡Jh@·>AI % � J*ÏxÎ[��³M�h¶>�JC@Ç´�B�ØP�-¶[�d�¡I >?IKØP�¡@ÍJC>AËKBvJh�d  Î�Í�¡Ø:>?³MH@h=�Ï~ÌÖ³M�·B½Ñ8>A ���CBMIËM��³MÌ.¶;>?I�BM��Ï~@ÍJLBv�@ÍÏ:@�JC�d¥�@ �79³P=?¥ÃBMI � É >A�dËP�¡�ÍJ�ß ��;Ù':$BnØ:>A  SU_�QMe)( åMáPá, .�¦Fe7+³M=?¥ÃBMI �àÉ >?�¡ËP�d��J ��ß ��.�/Î��¡�ÍÌÖ³P�Í¥Ã�¡ B� xÏxIBM¥Ã>A°�BM=9BMIBM=AÏ:@h>A@�ÌÖ³M��@ÍJh�d=A=ÊBM�Ð¥ÃBM@h@Ã�CBvJh>?³P@Ð>?I1JC´�p�CBMIËM�pá;F�ß � � á;F�;Ù.BvI �ÌÖ³P��¶>?IBM�ÍÏ�d°¡°d�¡IJh�h>A°d>AJh>?�¡@(á�� �nÝ�� á;FK1xF��*IÒJC´;�d>?�+@ÍJhH ;ÏPÙÅJh�d@ÍJ(ÎBM�ÍJh>?°d=A�d@^Ñ��d�Í�kÎ=ÊBv°d�d ¹>AIpJC´�k¶;>?I�BM��Ïp³M�h¶>�JLBM=Î=?BMI��¶[�¡J*Ñ��d�¡I1á;F áPå �Ý BMI  á;F è �Ý BvJE�¡>?ËP´KJY� � H�BM=A=AÏ~@hÎBM°d�¡  =?³PIËM>AJCH; �d@YÎ��¡�·@h�¡¥Ã>A¥�BnÓͳP�ÇBfÔx>?@dÙBMI ÒJh´�Ð@ÍÏ:@ÍJh�d¥'ѵBM@(�¡ØP³M=AØP�¡ �ÌÖ³P��Ñ�Bv�h ¹>?IÒJC>A¥Ã�YÌÖ³P�Eßná��Ƕ>AI�BM��Ï£Î[�d�h>A³x ;@dFEí.´�гPHxJC�d�ͥóM@ÍJ(@ÍJCBM¶=A�³P�Ͷ>AJ$Jh³¾Jh´�ÐÎ�h>A¥�BM��Ï£@�JLBM�$ÌÖ³P�$Ñ8´>A°L´»BM=A=Õ�d>AËP´KJÇÎ�BM�ÍJh>?°¡=?�d@$@ÍH�ÍØ:>�ØP�d  �ÖÑ8´>A°L´~Jh´�¡Ï¹�Í�¡ÌÖ�d�(JC³¾BM@(JC´;�� °d�h>�JC>A°�BM=�@h�d¥�>?¥ÃB�ÓͳP��BfÔx>?@ ��Ù ���b�µÑ�Bv@9 ;�¡JC�¡�h¥�>?I�¡ ¾ÌÖ³M�.��BM°L´¾@ÍÏ:@ÍJh�d¥¾F

É��E´�B�ØP�EÎ[�d��ÌÖ³P�h¥��d £BMI�BM=A³PËP³PH@8JC�¡@ÍJ$ÎBM�ÍJh>?°d=A�Y@Í>?¥EH;=ÊBvJh>?³PI@.ÌÖ³P�8JC´;�E¶>?IBM�ÍϾ@ÍJCBM�^@�Ï:@ÍJC�¡¥Ã@$�¦Ô �BM¥�>?I�¡ p>AIpJC´>A@�BM��JC>A°d=?�vÙ�Ñ8´>?°L´Ò>AI°d=AH �·� � H�BM=�¥ÃBM@Í@ � �éáxF è,�8¶>?IBM�ÍϾ@ÍJCBM�h@ �ÖÑ8>AJh´£�d°¡°d�¡IJh�h>A°d>AJh>?�¡@

Page 6: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ì +Yì

á � �nÝ��æá;FK1,$Pè,�UÙ�BMI p¶>?I�Bv�ÍÏ«@ÍÏ:@�JC�d¥�@^Ñ8>�JC´ � ß�&� óP��å,&� �ÖÑ8´�¡�h� �nÝ � á;F åPè�>AIp�dBM°L´Ò°�BM@Í���¦Fí��d@ÍJ8ÎBM�ÍJh>?°d=A�d@�ѵ�¡�h�$Î=?BM°d�¡ -¶��UJ*ѵ�¡�dI½á;F áKå��ݹBMI «á;F è �Ý �mÑ8>AJh´->?I°¡�h�¡¥Ã�¡IJh@�³MÌ¿á;F á;ß �ÝO�µBvJµ�d>AËP´KJ� � H�Bv=?=AÏ�@hÎ�Bv°d�d ½=?³PI;ËP>AJhH �d@.Î[�d�8@Í�d¥�>?¥ÃB�ÓͳP�.BfÔx>A@dF/É»�(H@Í�·B � Ñ8>? � � ¶>AI�BM�ÍÏ �@�Ï:¥ÃÎ=A�d°UJC>?°(Bv=?ËP³P�Í>AJh´¥ �UØP�d=A³PÎ[�d ¹¶KϹ¢µ´�BM¥·¶��¡�h@ SU_+QMe)( �VåMáPáPå,�8ÌÖ³P�9JC´�¡@h��BMI Ò@ÍH¶@Í� � H�dIKJEBM°d°¡�h�¡Jh>?³PIÒ@Í>?¥EH;=ÊBvJh>?³PI@¡F�í.´>A@BM=AËP³P�h>�JC´¥ >A@.¶�BM@Í�d «³PIªJC´�$¥ÃBMÎÎ;>?IËE¥��¡Jh´³: ª³MÌ�É >?@h ;³P¥ � 7+³P=A¥�BvI���ß �;ß��UÙ;BMI ªÑµBM@. �d@Í>?ËPI;�d JC³^°�BM=A°dH=?BvJC��JC´���UØP³P=AH;JC>A³PI·³vÌ�Î�BM�ÍJh>?°¡=?�d@8&v¶[³x >A�d@¿BM�h³MHI ÐB^°¡�dIKJC�hBM=@ÍJCBM�¿Ñ8>�JC´kB�¥ÃBM@Í@h>AØM�µ°¡³P¥ÃÎBMI>?³MIÎ[�d�ÍJhH�h¶;>?I˪JC´;��Î;�h>?¥ÃBM��Ï£@ÍJCBM�w&f >?@ͱ£@ÍÏ:@ÍJh�d¥¾F�<�Bv°L´»@ÍÏ:@�JC�d¥6ѵBM@$ÌÖ³P=?=A³nѵ�¡ ¹ÌÖ³M�kßná��Ƕ>?I�Bv�ÍÏ£³M�h¶>�JC@dÙBMI ~JC´��°d�Í>AJh>?°�Bv=/@h�d¥�>?¥ÃB�ÓͳP�(B�Ô;>A@9�mÌÖ³P�$Ñ8´>?°L´ BM=?=/�¡>?ËP´KJÇÎ�BM��JC>?°¡=?�¡@Ç�Í�d¥ÃBM>?I;�d »>AI~Jh´��@ÍÏ:@ÍJh�d¥P�(ѵBM@°�Bv=?°dH;=ÊBvJh�d �BMI ~>?@(ËP>AØM�dI�>?I~í�BM¶;=?�«ß���F �+³MJh��Jh´�BvJÇ@h³P¥��гM̵Jh´��@ÍÏ:@ÍJh�d¥�@·H@Í�d  ´�¡�h��´�B�ØP��ØMBv=?H�¡@³MÌ��nÝ»>?I¾¶��UJ*ѵ�¡�dI£Jh´³P@h�Ç�UÔ;BM¥�>?I;�d ¾>?IT7+³P=A¥�BMI �æÉ��d>AËP�d��J ��ß ��.�UÙ�BMI; ½HÎ[³PI½�UÔ:JC�hBMÎ�³M=ÊBvJh>?³PIªJC´;��h�¡@hH=�JC@8Î�Í�d@h�¡IKJC�d p>?I«í�Bv¶=?�kßÇBM�Í�Ç°¡³PI@Í>?@ÍJh�dIKJ8Ñ8>AJh´¾Jh´�d>A�.@ÍJCH; ;ÏPF

� � �T���� �r�@� ��� ����� � ��� ���������� �� È �����������@����

<�BM°L´1@h>?¥·H=ÊBvJh>?³PI�¶��¡ËP>?I;@·Ñ8>AJh´ B£ ;>?@h±�³MÌ+Î=ÊBMI;�¡JC�¡@h>A¥�BM=A@EBMI; 1Î;=ÊBMI�UJLBM��Ï»�¡¥E¶��ÏP³P@аd�¡IKJC�d�Í�d BM�ͳPHI 1Ñ8´�BvJ�ѵ�¾Ñ8>?=?=.�Í�¡ÌÖ�¡��Jh³ BM@ÐJC´�½Î�h>A¥�Bv�ÍÏ @�JLBM� ���UØP�¡IãJC´³PH;ËP´ ÌÖ³P�Ð¥�³P@ÍJÃ@h>A¥EH=?BvJC>A³PI@EJC´;�@ÍJCBM�h@^´�B�ØP�E� � HBM=Õ¥ÃBM@h@Í�d@dÙXBMI Ò>AIp³PI�·@h�¡J�³MÌ��hHI;@^JC´�YÎ=ÊBvI�¡Jh�d@h>A¥�Bv=?@+BMI £�¡¥E¶�ÍÏM³P@$�dI;°d>?�Í°d=A�YJC´;�=?³nÑ��d��¥ÃBM@Í@�@ÍJCBM�w�¦Ù;Ñ8>AJh´�JC´�$¥�>? ;Î=ÊBMI;�+³MÌ�Jh´�� >A@h±�°d³PÎ=?BMI�BM��JC³EJh´�$@ÍJh�d=?=?BM��³P�h¶>�J�Ù;BMI -JC´;��¶>?IBM�ÍÏ°d³M¥ÃÎ�BvI>?³PI»>?I BMI ³M�h¶>�J·�¦ÔxJh�d�Í>?³P�·Jh³£JC´�ÃJC�d�Í�h�¡@ÍJC�Í>ÊBM=�Î=ÊBvI�¡J·�h�dËM>?³PI�FÒí.´;�d@h�«@Í>?¥EH=?BvJC>A³PI@(H@Í�«BMI>?I;>AJC>?BM=K >A@h±(°d³P¥�Î[³P@h�¡ k³MÌ�Î=ÊBvI�¡Jh�d@h>A¥�Bv=?@�BMI k�¡¥E¶�ÍÏM³P@�Ñ8>�JC´E¥ÃBM@h@Í�d@�BMI; E³P�h¶;>AJC@�Ø:>?�ÍJhH�BM=A=AÏ(>? ;�dIKJC>A°�BM=JC³.Jh´³P@h��H@Í�d Y>?I(Î�h�UØ:>?³PH@�@Í>?¥EH=?BvJC>A³PI@�³MÌxJh�d�Í�h�d@�JC�Í>ÊBM=PÎ;=ÊBMI�UJ�ÌÖ³P�h¥ÃBvJC>A³PI�>AI�JC´� % HI � ¯MHÎ>�JC�¡� � % BvJCH�ÍI% Ï:@ÍJh�d¥¾ÙP>?I·Î�BM�ÍJh>?°¡H=ÊBM�¡ÙfJh´��¥�³x ;�d=³MÌ�¢µ´�BM¥·¶��¡�h@B�aåMáPá;ß���JC´BvJ�ѵBM@Õ¥�³P@ÍJ�@hH°¡°d�¡@h@ÍÌÖH;=�>?I·�Í�dÎ�ͳx ;H°d>AIËJC´;�YJC�¡�h�Í�d@ÍJh�h>?BM=¿Î;=ÊBMI�UJC@9>?I½³PH� % ³P=ÊBM� % Ï:@ÍJh�d¥¾F+¤+=AJh´³PHËP´¾JC´>A@+ÌÖ³P�Í¥EH=?BvJC>A³PI«>?@9I³MJ+°d³P¥�Î=?�UJC�vÙ�I³M� �s"�I>AJh>AØM�MÙ.>AJ�Î�ͳnØx>A �d@-B�¥�³x �¡=.JC´�BvJÃ�h�¡Î�h³: H°¡�d@-³MH�ÃJh�d�h�Í�d@�JC�h>?BM=8Î=ÊBvI�¡JÃ@ÍÏ:@ÍJh�d¥ �aBM=A¶��¡>AJkÑ8>AJh´@h³M¥Ã�UÑ8´�BvJ9=ÊBM�ÍËP�d�.�¡°d°¡�dIKJC�Í>?°d>�JC>A�d@w�8BMI ¾°�BvI½JC´H@9¶[�ÇH;@h�d £BM@9B��Í�¡ÌÖ�d�Í�dI°¡�·Î[³P>?IKJdF -�Ï«Î��¡�ÍÌÖ³P�Í¥Ã>AIËÐB=ÊBv�hËP�9�dI@Í�d¥E¶;=?�^³vÌ�BMI�BM=A³PËP³PH@�@h>A¥EH=?BvJC>A³PI@/>?Iö>?IBM�ÍÏ�@ÍÏ:@�JC�d¥�@µÑ8>�JC´�ØvBM��Ïx>AIË·³M�h¶>�JLBM=��d=A�d¥��dIKJC@¡ÙxÑ��°�BvIpBM@Í@h�¡@h@8JC´�(�¡Û��d°UJC@9³MÌ¿¶>?I�Bv�h>AJ*Ï�³PIªJC´�(Î=?BMI�UJ.ÌÖ³P�h¥ÃBvJC>A³PIªÎ�ͳx°¡�d@h@¡F

í.´�Y >?@ͱª>?@8°d³P¥�Î[³P@h�¡ p³MÌeQ½³x³MI � JC³PQpBM�h@ � @Í>X4d�¡ p�ͳx°L±KϾ¶�³: >A�d@.Ñ8´>?°L´pBM�h�YBM@Í@hH¥��d ¾JC³�´BnØM�BM=A�h��Bv ;ÏYÌÖ³M�h¥��d EÌÖ�h³M¥yB� >A@h±Ç³MÌ[ËKBM@/BvI Ð H@ÍJdF��*IÐÎ�BM��JC>?°¡H=ÊBv�dÙ;ßdë�Î=ÊBvI�¡JCBM�ÍÏY�d¥E¶;�ÍÏP³M@#�Ö��BM°L´�á;F á�, � JC>A¥Ã�¡@�JC´;�.¥�BM@Í@/³MÌ[JC´�8<�BM��JC´�Ù D�O��°d³P¥�Î�³M@h�.´�BM=�Ì[³MÌ�JC´�8 >A@h±·¥ÃBM@Í@dÙPÑ8´>A=?�µJh´�.�h�¡¥�BM>AI>?I;Ë�¥�Bv@h@Õ>A@ >A@ÍJC�Í>?¶HxJC�d �� � H�BM=A=AÏÃBM¥�³PIË�ßdëKá·Î=?BMI�¡Jh�d@Í>?¥ÃBM=?@;���dBM°L´-Ñ8>AJh´ªB·¥ÃBM@h@µ³MÌ�á;F áPá�, , D���¦Ù;Î�ͳ�Ø:>A >?IË·BJC³vJLBM=[ >?@ͱ�¥ÃBM@h@µ³MÌ¿äyåxFG+>D��F/í.´;�$>?I>�JC>ÊBv=��CBM >?BM=[�UÔ:JC�¡IJ9³MÌÅJh´�� >A@h±Ã>?@µ¶[�¡J*Ñ��d�¡IpáxFK ,+Y¤8â"ì-åxF áPè

���2c q�u��]c����rm�����m8v����Pc��/mnkXf��! �"#"%$#& i�cjl�' usl)(!c*�9a+�,(-�Gk mnlBo^mnk o�.�k m/�)�Guhqra-.ra��Gqrt10 u%��� m a�23(!i�kKc^o���� o�obu4��c msq5�m768.rk9�Kl]a��4:<;3�uCc^l��Kq3�cjthl]m����KusqUa]o=��c*( c#>?0 u%���Pq3.5( c^l�� ojmsk mskGthusl)�@�)�A( a�irlu4�4.rojc*�B����c�a]m�(!c;l]c^a�.�k9�]a*CD�Xf chf9CE����c�a]m�(!c�4� a<�]l��,0A.4�)�Guhq\u�' c+F�c^o����KusqG���,(!c^a

Page 7: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ì $Çì

¤8â ³vÌJC´��Î�h>A¥�Bv�ÍÏ$@�JLBM�¡ÙPBMI ÇJC´���CBM ;>?H@�³MÌ��dBM°L´E¶[³x ;Ï(>A@¿°dBM=?°¡H=ÊBfJC�d ·BM@h@ÍH¥�>?IË+B+¥ÃBvJC�¡�h>?BM=K �dI;@h>AJ*ϳMÌ= �Ëðd¥�� � Fµí.´�YÎ�h³vJC³PÎ=?BMI�UJC@8¶��¡ËKBMI«Ñ8>AJh´p>?I;>AJC>?BM=[�d°d°¡�dIKJC�Í>?°¡>AJC>A�d@9³MÌ � � á;F á;ßPÙ�>AI°d=A>?I�BfJC>?³MI@�� �á;F è��dÙÅBvI Ò@hÎ[�d°¡>Y"�°k>AI>AJh>ÊBM=ųP�Ͷ>AJCBM=��d=?�¡¥Ã�¡IKJC@^Ñ��d�Í��°L´;³P@h�¡I»BvJ^�CBMI; ³P¥ ÌÖ�h³P¥ @hÎ[�d°¡>Y"��¡ ~�hBMIËP�¡@��ÅJC´;�@CBv¥Ã�$@Í�¡J+³MÌ��hBMI ³M¥Ã=�Ï�@Í�d=?�¡°¡Jh�d ½ØvBM=AH�d@�ѵBM@9H@h�¡ ¾ÌÖ³M�8BM=?=�@Í>?¥EH;=ÊBvJh>?³PI@¡F

í.´� � Ñ8>A � � ¶>?IBM�ÍÏ ��BM=AËP³P�h>�JC´¥éJC´BvJ.ѵ�YH@h�(ÌÖ³P=A=?³nÑ8@µJC´;�Y�UØP³P=AH;JC>A³PI«³MÌÕ�dBM°L´p¶[³x xϪ>?IªJC´;�Y >A@h±@hH;¶:ÓÍ�d°UJ�JC³YËP�CB�Ø:>AJCBvJC>A³PI�BM=Î[�d��JCH�Ͷ�BvJh>?³PI@�ÌÖ�h³M¥�¶[³MJh´�@ÍJCBM�h@¡Ù;BvI �JC³YËP�CB�Ø:>AJCBvJC>A³PI�BM=;>?IKJC�¡�CBM°UJC>?³MI@µBvI °d³M¥ÃÎ=A�¡Jh�d=AÏY>?I;�d=ÊBv@ÍJC>A°�°d³M=?=?>A@h>A³PI@¿Ñ8>�JC´Ð³MJh´�d��¶[³x >A�d@/>AIÐJh´�8 >?@ͱ �a¢µ´�BM¥E¶[�d�Í@ SU_ÕQMe)( åváPáKå,�¦FeQpBvJh�d�Í>ÊBM=JC´BvJE>A@YI³vJkBM°¡°d�h�UJC�¡  ³PIKJC³£ËP�ͳnÑ8>?IË£Î;=ÊBMI�UJC@Y¥�B�Ϲ¶[�-=?³P@�JYÌÖ�ͳP¥6JC´�Ã@ÍÏ:@ÍJh�d¥ ¶Ï��d>�JC´�¡�·³P�Ͷ>AJh>?IËJC³:³$°d=A³P@h��Jh³$JC´�.°¡�dIKJC�hBM=�@ÍJCBM�/�ÖÌÖ³P�¿JC´�8@h>A¥EH=?BvJC>A³PI@�Î;�h�d@Í�dIKJC�¡ �´�¡�h�¡>?I�ÙKÎ=?BMI�UJC�d@Í>?¥ÃBM=?@8&v�d¥·¶�ÍÏM³P@/BM�Í��h�¡¥Ã³nØM�d ÐÑ8´�dI�JC´�¡>?�/Î[�d�h>?BM@ÍJh�h³PI � áxFAß8¤8â\�¦ÙK³P�/>AÌ�>AJÕ>?@/��ÓÍ�¡°¡Jh�d ÃÌÖ�ͳP¥æJh´�8@ÍÏ:@ÍJh�d¥ �Ö>AÌ[>AJh@ÕJC�CBnÓÍ�d°¡Jh³P�ÍÏ�UÔx°¡�d�d ;@8B· >?@�JLBMI;°d�^°¡³P¥�Î�BM�CBv¶=?�8JC³ÇJC´��¶;>?I�BM��ÏÐ@h�¡¥Ã>A¥�B�ÓͳM��B�Ô;>A@w�¦FÕ¤ Jh>?¥�� � @�JC�¡Î�³MÌ�$( �B�Ïx@µ>?@µH;@h�d XÙBMI  Jh´�ª�¡ØM³P=?H;Jh>?³PI»³MÌ9��BM°L´1@ÍÏ:@ÍJh�d¥ >A@·ÌÖ³P=A=?³nѵ�¡  ÌÖ³P�ÐåMáMá«ì èMáPá Q¾Ï:�¡F ��³P�kB£ >A@h°¡H@h@Í>?³PI ³PI JC´;�ØvBM=?>A >AJ*Ï~³MÌ+H@Í>?IË~B $ �  BnÏ�JC>A¥Ã� � @ÍJh�dÎ ÌÖ³P�EJh´>?@ÐBv°d°d�Í�¡Jh>?³PI  >A@h±�Ù�@Í�d� % �¡°¡JC>A³PI åxF åÒ³vÌ$G�H>AIJCBMI�B �²Å>?@Í@CBMH�¡�2�VåMáPá�+.�UF

QpBMIKÏ·³MÌ[³PH�Õ@Í>?¥EH=?BvJC>A³PI@�¶[�dËKBMIEÑ8>�JC´k¶>AI�BM��Ï·@�JLBM�Í@Õ³PIk´>AËP´=AÏÇ�¡°d°d�¡IKJC�h>A°8³P�h¶>�JC@¡ÙvÑ8´>A°L´ÐÑ�³PH=A Î[�d�ÍJhH�h¶k ;>?@h±(¥ÃBvJC�¡�h>?BM=>?IKJC³+¥Ã³P�Í�µ�¡=?=?>AÎ;JC>A°�BM=M³P�h¶>�JC@�JC´�BMI·>?@�°¡³PI@Í>? �¡�h�d k>AI·³PH;�Õ°L´³P@Í�dIk>?I;>AJC>?BM=K°d³MI > �JC>A³PI@¡F�A$I;�$¥Ã>AËP´KJ�ѵ³M�h�ÍÏ�JC´�BvJ.Jh´>?@.¥�>?@Í¥�BfJC°L´->AI¾>AI>AJh>ÊBM=�°¡³PI >�JC>?³MI@�°d³MH=? «Î�ͳx H;°d�ÇBk@ÍÏ:@ÍJh�d¥ÃBvJC>A°¶>?BM@->?I�³PH�-�Í�d@hH;=AJC@¡Fæí.´;>?@->A@h@hH;�£Ñ�BM@ª>AIKØP�d@�JC>AËKBvJC�¡  >?I ¤+ÎÎ��¡I > Ô - ³MÌYG�H>AIJCBMI�B � ²Å>?@h@hBMH�¡��VåváPá,+.�¦Ù�>?I£Ñ8´>A°L´~Jh´�k@ÍJCBMI �Bv�h ~¶>?¥�³x BM=¿ ;>?@h±F�aBM@$Î;�h�¡Ø:>A³PH@h=�Ï£ �¡@h°¡�h>?¶[�d  ��ѵBM@(°d�¡IKJC�d�Í�d »BM�h³PH;I °d=A³P@h�µ¶>?I�Bv�ÍÏY@ÍJLBv�h@dF �2JÕÑ�Bv@/@h´³nÑ8IÐJC´�BvJÕ¶��¡ËP>?II;>?IË9JC´�.Î�ͳMJC³MÎ=ÊBMI;�¡JC@¿Ñ8>AJC´EJh´�.BMÎ;Î�h³PÎ;�h>ÊBfJC�µI;�d@ÍJh�d �d=A=?>AÎ;JC>A°�BM=�³P�Ͷ>AJh@dÙ:�CBvJh´�d��JC´�BMI�>?I-I�dBM�h=�Ï�°d>?�Í°dH=?BM�µ³M�h¶>�JC@dÙ: >A -I³MJ.>A¥ÃÎBM°¡J�JC´�^�h�d@ÍH=AJh>?IËYÎ=ÊBvI�¡JCBM�ÍÏ@ÍÏ:@�JC�d¥�@^>AI¾B�@�JLBvJh>?@ÍJh>?°dBM=?=�Ï�@Í>?ËPI>)"�°�BvIJ8¥ÃBMII;�d�dF �*Ip³vJC´�¡�8Ñ�³P�Í @dÙ�JC´�(@�Ïx@�JC�¡¥�BvJh>?°Ç�¡Û��d°UJ+ÌÖ�ͳP¥ JC´;� >�ÛX�¡�h>?I;Ë·>?I;>AJC>?BM=�¡°d°d�¡IKJC�h>A°d>�JC>?�¡@�³MÌŶ[³: >?�¡@µ>?I���BM°L´ª >A@h±Ð³PI�Jh´�#"�IBM=�Î;=ÊBMI�UJ�@�Ïx@�JC�¡¥Ã@�Jh´�BvJµÌÖ³M�h¥ ��>AI³MJh´�d��Ñ8>?@h�Ð>A �dIKJC>A°�BM=�@ÍÏ:@ÍJh�d¥�@w��ѵ�¡�h��°¡³P¥�Î�BM�CBv¶=?�·Jh³«³P�(@h¥ÃBM=?=A�d�+Jh´�BMI¹JC´�Ð�UÛX�¡°¡JC@Ç�h�¡@hH=�JC>AI˪ÌÖ�h³P¥°L´�BM³M@dFkí.´�¡@h���h�d@ÍH=AJh@�ѵ�¡�h�ÃBM=?@ͳª°d³PI;@h>?@�JC�¡IJ(Ñ8>�JC´ÒJC�¡@ÍJ(Î�BM��JC>A°d=?�·@h>?¥·H=ÊBvJh>?³PI;@^>?IÒ�¡°d°¡�dIKJC�Í>?°Ð¶>?IBM�ÍÏ@ÍJCBM�8@ÍÏ:@ÍJh�d¥�@+Î[�d��ÌÖ³P�h¥��d «¶KÏ �/>?°L´BM�h ³ SU_µQMe)( �aåMáPáKè,�¦F

É����¦Ô;BM¥Ã>AI�E¶>AI�BM��Ï£@ÍJCBM�(@ÍÏ:@ÍJh�d¥�@$Ñ8>AJC´¹@�JC�d=A=ÊBM�^¥�BM@Í@$�CBvJh>?³P@��� D�� '�]D�� � D���� � ß�&� ;Ùß�&På:Ù:³M�µå�&� ;ÙPÑ8´�¡�h��D �8>?@/Jh´�8¥�BM@Í@�³vÌ�Jh´�+Î;�h>?¥ÃBM��ÏE@ÍJCBM��BMI PD��½>A@�Jh´�8¥�Bv@h@�³MÌ�Jh´�9°d³P¥�Î�BMI>A³PI�Fí¿BM¶=?�Çåk >A@hÎ=?BnÏ:@.JC´;�Ç@�JC�¡=?=ÊBv��Î�BM�hBM¥Ã�UJC�¡�h@8H@h�¡ p>AI¾³MH�8BM°d°¡�h�UJC>?³MI½@Í>?¥EH=?BvJC>A³PI@¡ÙxËP�ͳPHÎ[�d ¾>?IKJC³kÌÖ³PH;�@h�UJC@·BM°d°¡³P�h >AI˽Jh³½Jh´�Ã@�JC�¡=?=ÊBv�Ç¥ÃBM@Í@h�d@Y>?IKØP³M=AØP�¡ �F«í.´��¥ÃB�ÓͳP�Í>AJ*ÏÒ³vÌ.³PH�Ç@h>A¥EH=ÊBfJC>?³MI@$¶��¡ËP>?I¹Ñ8>AJh´� � H�Bv=�¥ÃBM@h@Ç@ÍJCBM�h@P� � ß�&På,��³MÌ��d>AJh´�d� D�� � D�� �×á;F èTD H � % �UJ·¤\�(³M�_D�� � D�� � ß9DIH� % �¡J;- �UF �*I«JC´;�Ç@Í>?¥EH;=ÊBvJh>?³PI@�³MÌ % �¡J^¢^ÙJC´�(Î�Í>?¥ÃBM�ÍÏÃ@ÍJCBM�2�ÖJh´�(³PI�$JC´�( >A@h±->A@.°d�¡IJh�d�Í�d ÒBM�ͳPHI  �>?@^¥Ã³P�Í�·¥ÃBM@h@Í>AØM�MÙ�D��� ßUDIH BMI  D�� �éá;F è D H � � ß�&� .�¦F��*I % �UJ :EÙ[Jh´�kÎ�Í>?¥ÃBM�ÍϾ@ÍJCBM��>A@@h¥ÃBM=A=?�d�¡Ù.D�� � áxF è DIH«BMI 3D�� � ß;DIH � � å,&� .�¦F¿í.´;�9@�JC�¡=?=ÊBv�Õ@h�¡¥Ã>A¥�B�ÓͳM�ÕBfÔx>?@ �ݽBMI Ð¶>?IBM�ÍÏ�d°¡°d�¡IJh�h>A°d>AJ*Ï �nÝ�BM�Í�ÐØvBM�Í>?�¡ Ò@hH°L´~JC´�BvJ$Jh´�ж>?IBM�ÍÏpÎ��¡�h>ÊBv@ÍJC�ͳPI£JLBv±M�d@dzPI�k³vÌ�Jh´�kJC´�Í�d�kØvBM=?H�¡@$Ü�Ý� èxÙ0$:F èxÙ¿³P��ßnὤ8â �Ö@h�¡��°d³M=?H¥�I@·åªì¹ë½³MÌ8í�Bv¶=?��å,�UF �9³MJC��JC´�BvJ·¶>?IBM�ÍϹ@�Ïx@�JC�¡¥Ã@·Ñ8>�JC´�¥EH°L´

Page 8: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ì 1Yì

Ñ8>? ;�d��Î��¡�h>?BM@ÍJh�CB�ѵ³MH=? �´�B�ØP�9=?>�JhJC=A���¡Û��d°UJµ³MI�Jh�d�h�Í�d@�JC�h>?BM=Î=?BMI�UJ�ÌÖ³M�h¥ÃBvJC>A³PI�ÙvÑ8´;�d�h�dBM@µ@�Ï:@ÍJC�¡¥Ã@�Ñ8>AJh´@h¥ÃBM=A=?�d��Î[�d�h>?BM@ÍJh�CB+Ñ�³PH=A E°d³M¥ÃÎ=A�¡Jh�d=AÏÇ �¡@ÍJh�h³nÏ·Jh´�.>?I>�JC>?BM=K >?@ͱY³vÌ�Î=ÊBMI;�¡JC�¡@h>A¥�BM=A@dF�í.´�.¶>AI�BM��ÏY@�JLBM�Í@BM�Í�^@h�¡Î�BM�hBvJC�¡ -¶KÏ �Ý � ßná;Ù[ß� V

�ÙåMá;Ù:³P��ëKáY¤8âÇÙ;BMI; �JC´�+�d°¡°d�dIKJh�h>?°¡>AJh>?�d@µBM�h�9ØvBM�h>A�d �>AI�Jh´���hBMIËP�+á

� �nÝ �7á;FK1,$PèxFÕí.´�;"ÌmJC´ª°¡³P=?H¥�I�³vÌ¿í¿BM¶=A�$åYËM>AØP�¡@µJC´;��³PH;Jh�d�h¥�³P@�J�@ÍJCBM¶=A��³P�h¶;>AJ�ÌÖ³P�µ�dBM°L´«@ÍÏ:@ÍJh�d¥¾Ù���\�Ö�UÔxÎ�Í�d@h@Í�d Ò´�¡�h�(>?I«¤8â#�UÙ�BM@. �¡@h°¡�h>?¶[�d ½>?IªJC´;�ÇÎ;�h�¡Ø:>A³PH@8@h�¡°¡JC>A³PI�F/í.´�Ç=ÊBv�hËP�¡@ÍJ.@Í�d¥�>?¥ÃB�ÓͳP�.BfÔx>A@ÌÖ³P��Ñ8´>A°L´½ÎBM�ÍJh>?°d=A�d@.°dBMI½¶[�(@ÍJCBM¶=?�(>AI½BvIÏ-³MÌ¿Jh´�Ç@ÍÏ:@ÍJh�d¥�@9Jh´�BvJ.Ñ��Y�¦Ô;Î;=?³P�Í�Ç>A@9åxFG+�¤8â ��í¿BM¶=A�Çå,�UÙÑ���JC´�¡�h�¡ÌÖ³M�h�$³P¥�>AJ�ËP>ÊBvIJµÎ=ÊBvI�¡[email protected]�BM=A³PËP³PH;@�JC³EJh´³P@Í�$>?I�Jh´� % ³P=?BM� % Ïx@�JC�¡¥ �ÖÑ8´>A°L´«³P�h¶>�J�¶[�¡ÏM³PI èE¤8â\��>?I«³PH;�9>AIKJC�dËM�CBvJh>?³PI@¡F

��³P��³MH�/BM°¡°d�h�UJC>A³PIE@h>A¥EH=?BvJC>A³PI@dÙf³PH���UÔxÎ=?³M�CBvJh>?³PIE³vÌ�Î�BM�CBv¥Ã�UJC�d�¿@hÎ�Bv°d�.´�BM@¿J*ѵ³(°d³MHÎ=?�¡ kËP³KBM=A@dFA�I�³MI�k´�BMI XÙ�Ñ��kÑ�BMIKJÇJC³« �UJC�d�Í¥Ã>AI�EJC´;���UÛX�¡°¡Jh@Y³MÌ�JC´;��¶;>?I�BM��Ï£³P�Ͷ>AJCBM=��¡=?�¡¥Ã�¡IJh@(³PI~Jh´� "�I�BM=JC�¡�h�Í�d@ÍJh�h>?BM=�Î=ÊBMI;�¡JY@ÍÏ:@ÍJh�d¥�@·Î�ͳx H;°d�d XF A�I~JC´�óMJC´�¡�Y´BMI �Ù�ÌÖ³P�·B¾ËP>AØM�dI�¶>?I�Bv�ÍϹ°d³MI'"�ËPH�hBvJC>A³PI�ÙÑ��ÃѵBMIKJ·JC³¾�UÔxÎ=A³P�h�ÐJC´;�à>A@ÍJh�h>?¶;H;JC>A³PI¹³MÌ�Î[³P@h@Í>?¶=A�Ð�h�d@ÍH=AJh>?I˾Î=?BMI�¡JCBM�ÍϹ@�Ï:@ÍJC�¡¥Ã@9�ÖÑ8´�¡�h��JC´���h� �@hH;=AJC@Ç¥EH@�JE¶[�à;�d@h°¡�h>A¶��¡  >?I¹JC�¡�h¥�@·³MÌ�B½ >A@ÍJC�Í>?¶HxJC>?³MI� H;��Jh³½JC´;��@h�¡I@h>�JC>�ØP�� ;�dÎ[�dI �¡I°d��³PI»JC´;�>?I;>AJC>?BM=�°d³PI; >AJh>?³PI@8�UF�í¿³nѵBM�h  JC´�¡@h�«�dI; @dÙ�ѵ�«´�B�ØP�¾Î[�d�ÍÌÖ³M�h¥��d  ÌÖ�h³M¥ ½ìI PáÒ>?IKJC�¡ËP�CBfJC>?³MI@ ��=?BM@ÍJ°d³M=?H¥�I >?I í¿BM¶=A�¾å,�YÌÖ³P�E�dBM°L´ ¶;>?I�BM��Ï @�JLBM�k°¡³PI'"�ËPH;�CBvJh>?³PI � ÕÙ �:Ý/Ù�BMI  �nÝ��·°d³PI;@h>? ;�d�h�¡  ´;�d�h�¡>?I�ÙÑ8>AJh´p@Í¥�BM=A=Å >AÛ��d�Í�dI°¡�d@�>AI½Jh´�·>AI>AJh>ÊBM=�°¡³PI >�JC>A³PI@���BÃ@h>AIËP=A�ÇÎ;=ÊBMI�UJC�¡@h>?¥ÃBM=�I�dBM�^áxF èxÙ�ßPÙ[³P�ÇßPF èФ8â>?@9¥�³�ØM�d ¾ÌÖ³P�ÍѵBM�h pBM=?³MIËÃ>�JC@9³P�h¶;>AJ9¶KÏpBÐ@h¥ÃBM=A=�BM¥Ã³MHIKJ ��ß$ì Ã¥��¡JC�¡�h@8�8Î�Í>?³P�.Jh³ÃJC´;�·>?IKJh�dËP�hBvJC>A³PI�F�* �dBM=?=�ÏPÙ�³vÌ.°d³PH;�h@h�vÙ/³PI��ѵ³PH;=?  Î[�d��ÌÖ³P�h¥!=ÊBv�hËP�¡�YIH¥E¶[�d�Í@·³MÌ8>AIKJC�dËM�CBvJh>?³PI@(JC³½¥Ã³M�h�ÐÌÖH=?=�Ϲ@CBM¥�Î=?�JC´;�Ç ;>?@ÍJh�h>A¶H;JC>A³PI@�³vÌ��Í�d@hH;=AJC@¡Ù�¶H;J9°d³M¥ÃÎHxJC�d�8�Í�d@h³MH�h°¡�d@9=?>?¥�>AJ�³PH�8@hBM¥ÃÎ;=?��@Í>X4d�vF

��� � � ���.�� ��� À �.�,�5�.�������  ����� �� ���@����

í.´>A@k@h�d°UJC>A³PI Î;�h�d@Í�dIKJC@ÐJC´;�ª�h�d@ÍH=AJh@гMÌ^³MH�kIH¥Ã�¡�h>A°�BM=�@h>?¥·H=ÊBvJh>?³PI;@dF¹É»�9"��Í@ÍJ�°d³MI@h>A �d�kJC´;�°L´�BM³vJC>?°½I�BvJhH�h�½³MÌ�JC´;�£>?IKJC�¡ËP�CBfJC>?³MI@T� �LëF�ß���BMI ã >A@h°¡H@h@-´;³�Ñ @Í�dI@Í>AJC>�ØP�£ ;�dÎ[�dI �¡I°d�Ò³MIã>?I>�JC>?BM=°d³MI >AJh>?³PI;@ÐBvÛX�¡°¡Jh@�Jh´�«I�BvJCH;�h�«³MÌ�³MH�Ð�h�d@ÍH=AJh@dF �*I �CëF å:Ù�Ñ��½Î;�h�d@Í�dIKJªBÒ¶�ͳKBM 1³nØP�d��Ø:>?�¡Ñ ³vÌ^³PH;�@h>A¥EH=?BvJC>A³PI@(¶KÏ»@Í´³nÑ8>?IË£J*Ï:Î>A°�BM=�@h� � H;�dI°¡�d@гMÌ8�¡ØM³P=?HxJC>?³MI BMI  ËM�dI�¡�CBM=�JC�h�¡I @E�¡¥Ã�¡�hËP>AIËp>AI»JC´;��h�¡@hH=�JC@¡FÕÉ»�^ÌÖ³:°dH;@�³PI-JC´;��Î�h³MÎ��¡�ÍJC>A�d@�³vÌ�"�I�BM=�Î=ÊBMI;�¡JLBv�ÍÏÃ@ÍÏ:@ÍJh�d¥�@.>?I �Lë;FK ;Ù:Ñ8´�d�Í�$@hH°L´«Î�ͳPÎ[�d�ÍJh>?�¡@BM�Í�Ç ;�d@h°¡�h>A¶��¡ ½>AI«Jh�d�Í¥Ã@.³MÌ¿ >A@ÍJC�Í>?¶HxJC>?³MI@dF

�O�@ �� �� � ���@����� � ���A

-µ�UÌÖ³P�h�9°d³P¥�Î�BM�Í>?IË(JC´;�+�Í�d@hH;=AJC@�³MÌXJh�d�Í�h�d@�JC�Í>ÊBM=�Î=?BMI�¡J�ËP�ͳ�Ñ.Jh´ÃÑ8>�JC´>AI�ØvBM�Í>?³PH@�¶>AI�BM��ÏÐ@ÍJLBv��@�Ïx@ �JC�¡¥Ã@¡Ù;>�J�>?@�ѵ³M�ÍJC´KÑ8´>A=?�9JC³·JCBM±M�(B·°¡=?³P@Í�d��=A³x³M±ÐBvJµJh´��@ÍJh³x°L´BM@ÍJh>?°�I�BfJCH�Í��³MÌÅJC´;�d@h�� � ¶[³x xÏÃ@Í>?¥EH;=ÊB �JC>A³PI@¡ÙPBMI k±v�d�¡Î�>AI·¥�>?I ÇJC´�ͳPHËP´;³PH;J�Jh´>?@¿@ÍJhH ;Ï �� � bfW:gÇ_*SU`¦zyTmW�_*SVgM`ÍQM_aTVbfW;]8QM`LS�WXbf_�S*O�|�SUz�SU`¦T�Z:SL]Lucdº:_/O[`CbMcUSL]�b�§>Rdº;QMe Tm_2QM_�TmlMS�QMW[Z-]U_2QM_�T?]U_�TVRhQMe[O[`CbLO�SU`¦_aTVSL]�b�§E_m|�S�bf`¡cdTm_m]U(�(�(�� � % BM´�B SU_9QMe)( ß �,$,�UF$í�³

Page 9: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ì Yì

 �¡¥Ã³PI;@ÍJC�hBvJC�8JC´;�+@Í�dI@Í>AJC>�ØP�9 �dÎ[�dI; �dI°¡��³PIÐJC´�9>?I;>AJC>?BM=;°¡³PI >�JC>A³PI@dÙ:��>AËPH�Í�$ß^@h´;³�Ñ8@�JC´�9�¡ØM³P=?HxJC>?³MI³MÌJ*Ñ�³�I�dBM�h=�Ï(>? �¡IKJC>?°dBM=K@h>A¥EH=?BvJC>A³PI@��ÖÑ8>�JC´��:Ý �7ß�á+¤8âYÙ �nÝ �ãá;F åPèxÙMBMI _D�� � D�� �7ß!DIH���JC´�BfJ >�ÛX�¡�^³PI=�Ïp>AIÒB£ßE¥��¡Jh�d��@Í´>AÌmJ^³MÌ�³PI�EÎ=?BMI�UJC�d@Í>?¥ÃBM=�I��Bv�Eßk¤8âyÎ�Í>?³P�9JC³-JC´;�E>?IKJC�¡ËP�CBfJC>?³MI�F$<�BM°L´Î�BMI;�d=Å@h´;³�Ñ[email protected]´�$�d°¡°d�dIKJh�h>?°¡>AJ*Ϫ³vÌ��dBM°L´½¶[³: ;Ï->AI-JC´�$ >A@h±�BM@8BEÌÖHI°¡Jh>?³PI«³MÌ�@Í�d¥�>?¥ÃB�ÓͳP��B�Ô;>[email protected]´;�@hÎ[�d°¡>Y"��¡ �Jh>?¥��MÙMBMI kJC´�.�hBM >AH@Õ³MÌ[��Bv°L´Ã@�Ïx¥·¶�³P=;>?@ÕÎ�ͳPÎ[³P�ÍJh>?³PI�Bv=:Jh³�JC´�.�hBM >?H;@/³MÌ�JC´�.¶[³x xÏ·JC´BvJ/>AJ�h�¡Î�h�¡@h�¡IJh@dF�í.´� "�h@ÍJ�J*ѵ³$°¡³P=?H¥�I@¿@h´³nÑ JC´��JC�d¥�Î[³P�CBM=:�¡ØM³P=?HxJC>?³MIYÌÖ�h³M¥ �dBM°L´Ð@h>A¥EH=ÊBfJC>?³MI�ÙfBMI EJC´;�JC´;>?�h k°¡³P=?H;¥ÃIkÎ=A³MJC@¿JC´�8 >A@h°d�Í�dÎ�BvI°¡Ïk¶[�¡J*Ñ��d�¡IÃJh´��J*ѵ³Ç@ÍÏ:@�JC�d¥�@�BvJ/JC´;�.°d³P�Í�h�d@ÍÎ�³MI >?I;ËÇ@Í>?¥EH;=ÊBvJh>?³PIJC>A¥Ã� ��Î=?BMI�UJC�d@Í>?¥ÃBM=?@8&v�d¥·¶�ÍÏM³P@�ÌÖ�ͳP¥é°d³P=AH¥ÃI;@µ³PI��BMI �J*Ñ�³kÑ8>AJC´�³P�h¶>�JC@�Ñ8´>?°L´ª >�ØP�¡�hËP�¡ ª>?I�� ��� ���@hÎBM°d�Y¶Ï¾¥�³P�h�(JC´BMI£á;F áPá;ßYBM�Í�·@h´;³�Ñ8Ip>?Ip�Í�d pBMI p>AIp¶=AH�MÙ��Í�d@hÎ[�d°UJC>�ØP�d=�ÏPF9¤�J·ß�áPá�ÏM��BM�Í@^>?IKJh³ÃJC´;�@h>A¥EH=?BvJC>A³PI�Ù�JC´�kJ*Ñ�³¾ ;>?@h±@(@h´;³�Ñ8I~>?I¹�¿>?ËPH�Í�-ß�BM�h�EØ:>A�ÍJCHBM=?=�Ͻ>A �dIKJh>?°�Bv=VF(¤^=�JC´³PH;ËP´£JC´�¡�h��BM�Í�kI³��ÓÍ�¡°¡Jh>?³PI@8I³M�.°d³P=A=?>?@Í>?³PI;@�Ñ8>AJh´>?I-Jh´��"��h@�J^èMáPáEÏP�dBM�h@9³MÌ¿�d>AJh´�d�.@Í>?¥EH;=ÊBvJh>?³PI�ÙJC´;�Ƕ[³: >?�¡@.>?IªJC´�( >A@h±BM�Í�Ç xÏxIBM¥Ã>A°�BM=A=AÏÃ�UÔx°d>�JC�¡ �Ù��d@ÍÎ��¡°d>ÊBv=?=AÏÃJC³nѵBM�h @8JC´;�dzMH;JC�¡�9�¡ ËP�dzMÌ�JC´�Ç >?@ͱ�Ù�BMI ¾¶��¡ËP>?IªJC³��UÔx´>A¶>AJ°L´�BM³vJC>?°8¶[�d´�B�Ø:>?³M�dFÕí.´�9ËP�¡I�d�hBM=�¶��¡´�B�Øx>A³P��³MÌXJh´�9 >?@ͱE>?@�@h>A¥Ã>A=ÊBM��BM¥�³PIË(JC´�.J*Ñ�³·@ÍÏ:@�JC�d¥�@dÙ:ÏP�UJµJC´;�@ÍJh³x°L´BM@ÍJh>?°(I�BvJhH�h�(=?�dBM @�Jh³��Í�d¥ÃBM�h±fBM¶;=AÏ- ;>AÛ��d�h�¡IKJ/"I�BM=�Î=?BMI�UJLBM��Ϫ@ÍÏ:@ÍJh�d¥�@dF

��>AËPH�h�¡@-åvB»BMI  åv¶��dBM°L´ @h´³nÑ Jh´�p³P�Ͷ>AJCBM=8�d=A�d¥��dIKJC@�³MÌ(B»@Í>?IËM=?�«Î=ÊBvI�¡Jh�d@h>A¥�Bv=�ÌÖ�h³P¥ JC´;�J*Ñ�³�@h>A¥EH=?BvJC>A³PI@-Î�Í�d@Í�dIKJC�¡  >?I ��>?ËPH;�h� ßPF�í.´��@Í�d¥�>?¥ÃB�ÓͳP�«BfÔx>A@I� �

��UÙ��¡°d°d�¡IKJC�h>A°d>�J*ÏL� �

��UÙ(BvI 

>?I;°d=?>AI�BvJh>?³PI¾�h�¡=ÊBvJh>AØP�YJC³-JC´;�k¶>?I�Bv�ÍϽ³P�h¶>�JLBM=�Î=?BMI� � ���^BM�Í�k@h´³nÑ8I�BM@$B-ÌÖHI°UJC>A³PIÒ³MÌ�JC>A¥Ã�ÇÌÖ³P�^JC´;�

"��Í@ÍJ~ßnáPáPá ÏM��BM�Í@½³MÌÇJC´;�~>AIKJC�dËM�CBvJh>?³PI@¡F �*I7�¿>?ËPH�Í�¹åMB;Ù9JC´�¹J*Ñ�³ Î=?BMI�UJC�d@Í>?¥ÃBM=?@ ��@h´;³�Ñ8I >?I �h�¡ BMI  >AI ¶=?H;���ö[�dËKBvI Ñ8>�JC´ãJh´�£@CBv¥Ã�Ò@Í�d¥�>?¥ÃB�ÓͳP�ÃBfÔx>?@-I�dBM�ÒßÒ¤8âYÙ�BMI   >AÛ��d�Í�d  ³PI;=AÏ ¶ÏãBãߥ��¡JC�¡�E@h´;>AÌmJk>AI»JC´�¡>?�E¥���BvI BMI³P¥ÃBM=AÏMF£í.´�ªJ*Ñ�³~Î;=ÊBMI�UJC�¡@h>?¥ÃBM=A@Y@Í´³nÑ8I1>AI ��>?ËMH�h�-åv¶�Ù/ÌÖ�h³P¥!JC´;�@CBv¥Ã�EJ*Ñ�³½@Í>?¥EH;=ÊBvJh>?³PI@^BM@$JC´�ÐÎ=?BMI�UJC�d@Í>?¥ÃBM=?@+>?I~��>AËPH�h�kåMB;ÙŶ[�dËKBMIÒÑ8>�JC´¹>? �¡IKJC>?°dBM=Õ>AI>AJh>ÊBM=�³P�h¶;>AJC@I�dBM��á;F�Kèk¤8âYF[í.´�·ØvBM=AH�d@9³MÌ/�dBM°L´£�d=A�d¥��dIKJ�³M@h°d>A=?=?BvJC��Ñ8>�JC´½Jh>?¥��( H�YJh³ÃJh´�·°¡³P¥E¶>AI�d ½�¡Û��d°¡J^³MÌJC´;�·@ÍJh�d=A=ÊBM�+BMI £Î;=ÊBMI�UJLBM��Ï«Î��¡�ÍJhH�h¶�BfJC>?³MI@dÙ�BMI pJh´�E³P�Ͷ>AJh@+³vÌÕJ*ѵ³ªÎ;=ÊBMI�UJC�¡@h>?¥ÃBM=A@9°¡=?�dBM�h=�Ï« >AØM�d�hËM�ÌÖ�h³M¥ ³PI;�kBMI³MJh´�d�^³PI£JC>A¥Ã�¡@h°�Bv=?�d@+=?³PI;ËP�d�9JC´�BMI£Jh´�d>A�^@Í´³P�ÍJ�Î��¡�h>?³: £³P@Í°d>A=?=ÊBfJC>?³MI@dF+í.´�k >AØM�d�ÍËP�dI°¡�¶[�¡J*Ñ��d�dI"JC´�¹@Í>?¥EH=?BvJC>A³PI@�>?@ª¥ÃBM>?I;=AÏ1 H�£Jh³1 ;>?@h°¡�h�UJC�¹�¡ØM�dIKJC@¡Ù$>VF �MFy°¡=?³P@Í�Ò�dI°¡³PHIKJC�¡�h@¾¶��UJ*ѵ�¡�dIÎ=?BMI�¡Jh�d@Í>?¥ÃBM=?@8&v�d¥E¶;�ÍÏP³M@dÙxBMI -JC´;�$²�ÏKBMÎH;I³nØ�JC>A¥Ã�9ÌÖ³P��Jh´�d@Í�� � ¶�³: ;ÏÃ@ÍÏ:@ÍJh�d¥�@ �ÖÑ8´�¡�h�� � ß�è�+.�>?@8³MÌ¿³P�Í �d�Çßná � ÏP�dBM�h@¡F �*Ip�¿>?ËPH�Í�ÇåMB;ÙJh´�YÎ;=ÊBMI�UJC�¡@h>?¥ÃBM=�@Í´³nÑ8Ip>AI½�Í�d «Ñ�BM@9H=�JC>?¥ÃBvJh�d=AÏÃ��ÓÍ�¡°¡Jh�d £BfJ+;FG1_Q¾Ï:��>?IKJC³ÇJC´�/"��h@�J�>?IKJh�dËP�hBvJC>A³PI�ÙPÑ8´>A=?�8JC´�+Î=ÊBMI;�¡JC�¡@h>A¥�BM=�@Í´³nÑ8I->?Iö=?H;�9ÌÖ�¡=?=�JC³ÇÑ8>AJC´;>?IÃá;FAß+¤8â³MÌ�JC´;�E°d�¡IJh�CBM=�@ÍJLBv�$BvJkßnáxFK+ Q«Ïx�$>AIKJC³�Jh´�k@h�¡°d³PI ¹>AIJh�dËP�hBvJC>A³PI�F �*I¹��>AËPH�Í�kåv¶�Ù�JC´�EÎ;=ÊBMI�UJC�¡@h>?¥ÃBM=@h´;³�Ñ8I >AI»�h�¡  °d³P=A=?>A �d ¹Ñ8>AJh´ BMI³MJh´�d�YÎ=ÊBvI�¡Jh�d@h>A¥�Bv=�BfJ-ßPF ë�Q¾Ï:�dÙ�BvI »JC´;>?@·¥�³P�Í��¥ÃBM@h@Í>AØP�ö�³: ;ÏѵBM@�=ÊBfJC�d�^BM°d°¡�h�UJC�d Ò¶KÏpBMIÒ�d¥·¶�ÍÏM³ªBvJ(è 1 Q¾Ï:�dF$í.´�·Î=ÊBMI;�¡JC�¡@h>A¥�BM=�@Í´³nÑ8IÒ>?I£¶=AH�·>AIÒ��>AËPH�h�·åv¶�Ù´³nÑ��¡ØP�¡�dÙ�ѵBM@8@ÍÑ��dÎ;J+HΫ¶KÏ«Bk=ÊBM�ÍËP�d���d¥E¶��ÏP³ÃBvJ.ë $:FK+UQ¾Ï:�.>?IKJh³EJC´�(@h>A¥EH=?BvJC>A³PI�F�¤^=AJh´³PHËM´ª@h¥ÃBM=?= >�ÛX�¡�h�dI;°d�d@Y>?I~>?I>�JC>?BM=¿°¡³PI >�JC>A³PI@3�aBM¥�³PI˾BMI�³MJC´;�d�ÍÑ8>A@h��>? �¡IKJC>?°dBM=/@ÍÏ:@�JC�d¥P�$°�BMI�H=AJh>?¥ÃBvJC�¡=AϽ=?��Bv JC³YJC´�^ÌÖ³M�h¥ÃBvJC>A³PIóvÌ¿�¡IKJC>?�Í�d=�Ïà;>AÛ��d�h�¡IKJ�JC�¡�h�h�¡@ÍJh�h>ÊBv=�Î=?BMI�UJ�@ÍÏ:@�JC�d¥�@ ��IH¥·¶��¡�dÙ¥ÃBM@h@Í�d@¡Ù�BMI -³M�h¶>�JC@dÙ�¡Jh°MFK�UÙ�JC´�ª�dBM�h=�Ï»�UØP³P=AH;JC>A³PI ³MÌ9JC´;�ª >?@ͱ�>A@E@h>A¥Ã>A=ÊBM�YBM¥�³PIË£@�Ïx@�JC�¡¥Ã@kÑ8>AJh´ JC´�ª@hBM¥��ª¶>?I�Bv�ÍÏ�@ÍJLBv�Î�BM�hBM¥��¡JC�¡�h@¡ÙxBvI �Jh´�d�Í�9BM�h�8°d=A��BM�ÕJh�h�¡I @�>?IkJC´�B"�I�Bv=�Î=ÊBMI;�¡JLBv�ÍÏE@�Ï:@ÍJC�¡¥Ã@�JC´�BfJ/ÌÖ³P�h¥ ��BM@�Î�h�¡@h�¡IJh�d BMI ¾ >A@h°dH;@h@h�¡ p>AI«Jh´�(I�UÔ:J8J*Ñ�³�@hH;¶@h�¡°¡JC>A³PI@8�UF

Page 10: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìpßnáYì

�O� � ��E� �����+��� ��� Æ � C� ���4

í¿BM¶=?�# · >A@hÎ=?BnÏ:@¡ÙxÌÖ³P����BM°L´ª¶;>?I�BM��Ï�@ÍJLBv�µ°d³MI'"�ËPH�hBvJC>A³PI�ÙxB·@h�UJ.³MÌ�@�JLBvJh>?@ÍJh>?°¡@� �UØP�¡=?³PÎ[�d -Jh³E´�d=AÎ� H�BMIKJC>�ÌmÏ JC´� "�I�BM=9Î=ÊBvI�¡JCBM�ÍÏ1@ÍÏ:@�JC�d¥�@�ÌÖ³P�Í¥Ã�¡ �F"<�BM°L´ � ÕÙ �:Ý/Ù �nÝ���°¡³PI'"�ËMH�CBvJh>?³PI >?@�=?>A@ÍJC�¡ �>AI°d³M=?H¥�I ßPÙµBvI  JC´�«IH¥E¶[�d�гMÌ^�hHI@ÐÎ[�d��ÌÖ³P�h¥��d  ÌÖ³P�k�dBM°L´�°¡³PI'"�ËPH;�CBvJh>?³PI1BM�Í�ªËP>AØM�dI1>?I °d³P=AH¥�IåxF£¢µ³P=?H¥�I@2 «ì1ß� pBM�h�à�h"�I;�d  BM@·ÌÖ³M=?=?³nÑ8@P��@Í�d�«¢µ´�Bv¥E¶��¡�h@EåMáPá;ßPÙ/G$H;>?IKJLBMIB SU_(QMe)( åMáMáKåxÙÕBvI G�H>?IKJCBMI�B ��²�>A@h@hBMH�d�ÇåváPá,+ÃÌÖ³P�^¥�BvJh´�d¥ÃBvJh>?°�Bv=� ;�d@h°¡�h>AÎ;JC>A³PI@$³MÌ�¥�³P@ÍJ$³vÌ�Jh´�d@Í�k@ÍJCBvJC>A@ÍJC>A°d@8�UF �+³MJh�JC´BvJ�Ù�Ñ8>�JC´~JC´�Ã�UÔx°d�¡Î;JC>A³PI ³MÌ8°d³M=?H¥�I è:ÙÕ³PI=�ÏÒJC´�ªB�ØM�d�CBvËP�ÃØvBM=AH��³MÌ���BM°L´ @�JLBvJh>?@ÍJh>?°�>?@ÇËP>AØM�dI»ÌÖ³M���Bv°L´½@Í�¡J�F

� �� í.´�EB�ØP�¡�CBMËM�EIH¥E¶[�d�9³MÌ/Î=?BMI�¡Jh@dÙ � � Ù�BvJ+=?��Bv@ÍJ^BM@+¥ÃBM@Í@h>AØM�EBM@8JC´;�·Î=?BMI�¡J\Q½�¡�h°dH;�ÍÏF�Väéá;F á�+Q � �UÙPJC´BvJ�ÌÖ³P�Í¥æ>AI·JC´;��@ÍÏ:@ÍJh�d¥¾F �+³MJh�µJC´BvJ/��Bv°L´k³MÌ�JC´��ßdë$Î=ÊBMI;�¡JLBv�ÍÏÇ�d¥E¶;�ÍÏP³M@/>?I·Jh´�.>?I>�JC>?BM= >A@h±-@hBvJC>A@ÍÌmÏÃJC´>A@.¥�BM@Í@8�h� � H>A�h�¡¥Ã�¡IJdÙ�BM@8 ³Ð¶�³: >A�d@.°d³MI@h>A@ÍJC>AIËгMÌ�BvJ9=?��Bv@ÍJ;$EÎ=ÊBvI�¡Jh�d@h>A¥�Bv=?@dF

� �� í.´�ÐB�ØP�d�hBMËP�EIH¥·¶��¡��³MÌ�¥�>?I³P�9Î=?BMI�¡Jh@dÙ ���+Ù�=?�¡@h@^¥ÃBM@Í@h>AØM�·JC´BMI£JC´�·Î=ÊBMI;�¡J Q¾�d�h°¡H�ÍϽJC´�BfJ�Í�d¥ÃBM>?Iª>AI«Jh´��"�I�BM=Å@�Ï:@ÍJC�¡¥½F

�� � í.´�Y¥ÃBfÔx>?¥·H¥�@Í�d¥�>?¥ÃB�ÓͳP�µBfÔx>?@8³MÌ�JC´��"�I�Bv=ÅÎ=ÊBMI;�¡JC@¡Ù �������� F

��� � í.´�ÇBnØM�d�hBMËP��ØvBM=?H;�$³MÌ�JC´�$�hBvJC>A³E³MÌ�JC´�(¥ÃBfÔx>?¥EH;¥�@Í�d¥�>?¥ÃB�ÓͳP�µBfÔx>?@µJh³ÐJh´�$³PH;Jh�d�ͥóP@�J.@ÍJCBM¶=A�³P�Ͷ>AJ�³MÌ¿Jh´�(@ÍÏ:@ÍJh�d¥¾Ù �

� ����� &����LF��� � í.´�Y¥ÃBfÔx>?¥·H¥ BvÎ�BM@ÍJh�h³PI«³MÌ�JC´;� "I�BM=ÅÎ=?BMI�¡Jh@dÙ �

�� �

���ß � �

��UF

��� � í.´��B�ØM�d�CBvËP�ÃØvBM=AH�гM̵Jh´�Ã�hBvJC>A³«³M̵Jh´�Ã¥ÃBfÔx>?¥·H¥'BMÎBM@ÍJh�h³PI���JC³«JC´��¶>?IBM�ÍϹÎ[�d�Í>ÊBM@�JC�h³MI

ÜdÝ�� �Ý���ß�ì �nÝ��¦F

��� � í.´�ÇÌÖ�hBM°¡Jh>?³PIª³vÌ¿Jh´��"�I�BM=Å¥ÃBM@h@.>AIªJC´�(=ÊBv�hËP�¡@ÍJ8Î=?BMI�¡JdÙ���+F� ���� í.´;�kÎ��¡�h°d�¡IKJLBMËP�k³vÌ/JC´�k>AI>AJh>ÊBM=Å¥ÃBM@h@+JC´�BvJ+Ñ�Bv@$=?³P@�J�Ù�� �"!�ÙX ;H�EJC³-°¡=?³P@Í�E�dI;°d³PHIKJh�d�h@3� � á;F�ß

¤8â#��Ñ8>�JC´ªJC´;�ÇÎ;�h>?¥ÃBM��Ï�@�JLBM�¡F� � �� í.´;�kÎ��¡�h°d�¡IKJLBMËP�k³vÌ/JC´�E>AI>AJh>ÊBM=Å¥ÃBM@Í@^JC´�BfJ^ѵBM@$��ÓÍ�¡°¡JC�¡ ÒÌÖ�h³P¥ JC´�·@ÍÏ:@ÍJh�d¥ Ñ8>�JC´³PHxJ�Î�BM@Í@h>AIË

Ñ8>�JC´>AI«á;FAßǤ8â ³MÌ�JC´�(Î�Í>?¥ÃBM�ÍÏÃ@ÍJCBM�dÙ#� �%$^F� � í.´;�-JC³MJCBM=�¥��d°L´BMI>?°dBM=��Ö±>?I�UJC>?° � Î[³MJh�dIKJC>?BM= �$�dI�¡�hËMÏ»Î��¡�EHI>�Jk¥ÃBM@h@·ÌÖ³M�YJC´;�-Î=ÊBvI�¡Jh@E�h� �

¥ÃBM>?I;>?IËkBfJ.JC´�(�dI; ½³MÌ�Bk@h>A¥EH=ÊBfJC>?³MI�Ù�&�Ù�I³P�Í¥�BM=A>X4¡�d -¶KÏ'&)(�ÙJC´�(�¡I�d�ÍËMϪÎ[�d�8HI>�J8¥�BM@Í@.³MÌJh´�( >?@ͱ-¶�³: >A�[email protected]´�(¶��¡ËP>?II;>?IËk³MÌ�JC´;�Ç>AIKJC�dËM�CBvJh>?³PI�F

� �� í.´;�ÐBMIËPH=?BM�^¥�³P¥��dIKJCH;¥ Î[�d�^HI>AJ�¥�BM@Í@�³MÌ/Jh´�_"�I�BM=¿Î=ÊBvI�¡Jh@dÙ+*.Ù�I³M�h¥ÃBM=?>Y4d�d ½¶KÏ,*-(nÙXJC´;�BMI;ËPH=ÊBv��¥Ã³M¥Ã�¡IJhH¥ Î[�d�8HI;>AJ8¥ÃBM@h@.³MÌ¿JC´�(>AI>AJh>ÊBM=�@ÍÏ:@�JC�d¥¾F

Page 11: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìpßPß^ì

��³P�$°d³M¥ÃÎ�Bv�h>?@ͳPI�ÙÅÌÖ³P=A=?³nÑ8>?IËÃJC´�Ð�h�¡@hH=�JC@(ÌÖ�h³P¥ % �¡Jh@Y¤ � : Bv�h��BMI�BM=A³PËP³PH;@�@ÍJCBvJC>A@ÍJC>A°d@$ÌÖ³P�$JC´;�ÌÖ³P=A=?³nÑ8>?I˽@ÍÏ:@ÍJh�d¥�@��ªJC´;�«Jh�d�Í�h�d@�JC�Í>ÊBM=�Î;=ÊBMI�UJC@UQ½�¡�h°¡H�ÍÏ � D��¡IH@ � <�Bv�ÍJC´ � QpBM�Í@�>AI JC´� % ³M=ÊBM� % Ïx@�JC�¡¥� � Q¾D�< Q �AÙ[³MÌÕÑ8´>A°L´p³PI;=AÏ-Jh´�h�¡�EBM�Í�·BM°UJCH�Bv=�³M¶@h�¡�ÍØvBM¶=A�d@w� �[Jh´�YBnØM�d�hBMËP�d ½ØMBv=?H�¡@9ÌÖ³P�/ ;ßYBM°¡°d�h�UJC>A³PI@h>A¥EH=?BvJC>A³PI@8>?IpJh´� % H;I � ¯MHÎ;>AJC�¡� � % BvJCH;�hI£@�Ïx@�JC�¡¥ � � % ¯ % B�ØP� ��ÙÅ¢µ´BM¥E¶[�d�h@$åMáPá;ßPÙ�G�H>?IKJLBvI�B �é²Å>?@ �@CBvH�d�EåMáPá,+.� ��JC´;�-B�ØP�¡�CBMËP�¡  ØvBM=?H�¡@ÇÌÖ�ͳP¥ B½@Í�¡JE³vÌ8BM°d°¡�h�UJC>?³MI @h>A¥EH=ÊBfJC>?³MI@(BM�h³MHI �Jh´� % HI»Ñ8>AJh´I�¡>AJC´;�d�µËM>ÊBMIKJ�Î;=ÊBMI�UJC@�I³P��BY@ÍJC�¡=?=?BM��°¡³P¥�Î�BMI>A³PI�Î[�d��JCH�Ͷ>?IËÇJC´�^@ÍÏ:@ÍJh�d¥ � � % HI B�ØP����Ù�G�H>AIJCBMI�B SU_QMe)( åMáPáKå,� ��JC´��B�ØP�¡�CBMËM�d ¹ØMBv=?H�¡@�ÌÖ³P��JC´�kÎ;=ÊBMI�UJC@�ÌÖ³P�Í¥Ã�¡ ÒÑ8>AJC´;>?I~å-¤8â ³MÌ�JC´� % HI � ³PI=�Ïp@Í>?¥EH;=ÊB �JC>A³PI@B� � % HI B�ØP�2� ���ãå^¤8â#� ��ÙKG�H>?IKJCBMI�B SU_¿QMe)( åMáPáKå,� �KBMI kJh´�.B�ØP�¡�CBMËP�¡ �ØvBM=AH�d@¿ÌÖ³P��JC´;��Î=ÊBvI�¡JCBM�ÍÏ@ÍÏ:@�JC�d¥�@^ÌÖ³P�Í¥Ã�¡ £BM�ͳPHI [Z㢵�dIp¤y>?I½@h>A¥EH=ÊBfJC>?³MI@.ÌÖ³P�9Ñ8´;>?°L´£JC´;�· >A@h±«¶��¡ËKBMI£°¡³PÎ=?BMI�BM�2� ��� á � �JC³kJh´� Z ¢µ�dIp¤#-"¶;>?I�BM��Ï-³P�Ͷ>AJCBM=XÎ;=ÊBMI�U� � Z1¢µ�¡IF� � � á��n� ��Ù�G�H>AIJCBMI�B SU_µQMe)( åMáMáKå,�UF

í¿BM¶=?�_ -@h´³nÑ8@(¶�³vJC´£JC´;�k@ÍJC�Í>?±>?I;Ë-HI>�ÌÖ³P�h¥�>AJ*Ï«³MÌ#�Ö¥�BMIKϽ³MÌ8�9JC´�¡@h�k@�JLBvJh>?@ÍJh>?°dBM=�¥���BM@ÍH�h�¡@dÙÅ>AI@hÎ;>AJC�(³MÌ�JC´;�ÇËM�h��BfJ+ ;>AØP�¡�h@Í>AJ*Ϫ³MÌ¿@ÍJh�d=A=ÊBM�.°¡³PI'"�ËPH;�CBvJh>?³[email protected];I �d�9°d³MI@h>A �d�hBvJC>A³PI�Ù�BMI; ¾Jh´�(@ÍÏ:@ÍJh�d¥ÃBvJC>A°ØvBM�h>?BvJC>A³PIã³MÌÇJC´;�~³MH;JCÎHxJ«¥Ã�dBM@hH�Í�d@ªÑ8>AJh´ >?I>�JC>ÊBv=+°¡³PI >�JC>?³MI@dF ��³P���UÔ;BM¥�Î=?�vÙ^°d³M=?H¥�I 1 @h´³nÑ8@JC´BvJªJC�¡�h�h�¡@ÍJh�h>ÊBv=$Î=ÊBMI;�¡J«@ÍÏ:@�JC�d¥�@¾´�B�ØP��B ��I��BM�Í=AÏ °¡³PI@�JLBMIKJ �1@h>Y4d�vÙ�¥Ã�dBM@hH;�h�d  BM@¾B ÌÖ�CBM°UJC>A³PI ³M̶>AI�BM�ÍÏ-Î��¡�h>ÊBv@ÍJC�ͳPI�FBA�I½³PI�Ç´�BMI �Ù�Jh´>?@9@h>Y4d�Ç�CBvJh>?³Ð=?>A�d@8>?I«JC´�Ç�CBvIËP�Yá;FAßnåkJh³-á;F å� kÌÖ³P�8��BM°L´£@Í�¡J+³MÌ@h>A¥EH=?BvJC>A³PI@dF A$I¾JC´�Y³MJC´;�d�9´�BMI �Ù[JC´>A@+@Í>X4¡�Y�hBvJC>A³Ã°¡=?��Bv�h=AϪØvBM�Í>?�¡@+@�Ïx@�JC�¡¥�BvJh>?°dBM=?=�Ï-Ñ8>AJh´½ØvBM�h>?BvJC>A³PI@>?IEJh´�8°d=?BM@h@/³MÌ�>?I;>AJC>?BM=°d³PI; >AJh>?³PI@¡FeA^Ì�°d³PH�Í@h�vÙJh´�.�CBfJC>?³�ØvBM�Í>?�¡@ÕÌÖ�h³P¥æ@ÍÏ:@ÍJh�d¥ JC³$@�Ï:@ÍJC�¡¥ Ñ8>AJh´>?IkJC´;�@CBv¥Ã��°d=ÊBv@h@�³vÌ�@ÍJLBv�ÍJC>AIË^°¡³PI >�JC>A³PI@dF % >A¥Ã>A=ÊBM�Ŷ[�d´�B�Ø:>?³M��³:°d°dH;�h@¿ÌÖ³M�ÕBM=A=:³vÌ�JC´�¡@h��@�JLBvJh>?@ÍJh>?°dBM=¥Ã�dBM@hH�Í�d@ �JC´;�¡ÏpBM=?=�´�B�ØP�EÑ��d=A= �  �h"�I;�d £°L´�Bv�CBM°UJC�d�Í>?@�JC>?°ÇØvBM=?H�¡@^ÌÖ³P�8JC´�·�dIKJC>A�h� �Ö >AØM�d�Í@h���^@Í�¡J$³vÌ/@ÍÏ:@ÍJh�d¥�@$HI �¡�°d³MI@h>A �d�hBvJC>A³PI�ÙXJh´�¡Ï£BM=?=�ØvBM�ÍÏp@ÍÏ:@ÍJh�d¥ÃBvJC>A°�BM=A=AÏ«Ñ8>AJh´£JC´�k°¡=ÊBM@Í@�³MÌ�>?I>�JC>?BM=�°d³PI ;>AJC>A³PI@¡Ù�BMI ÒJh´�¡Ï£BM=?=ØvBM�ÍÏ @ÍJC³:°L´�BM@�JC>A°�BM=A=AÏ»ÌÖ�ͳP¥ °dBM@h�«JC³~°�BM@Í�¾ÌÖ³M�k@ÍÏ:@ÍJh�d¥�@ÃÑ8>AJh´>?I Jh´�½@hBM¥��I�Ö�¡Û��d°UJC>AØM�d=�Ï � � H>�ØMBv=?�dIKJw�°d=?BM@h@8³MÌ¿>?I;>AJC>?BM=[°d³PI ;>AJC>A³PI@¡F

¤ Øx>A@hH�Bv=[°¡³P¥�Î�BM�h>A@h³PI�³MÌ�Jh´�^�UÛX�¡°¡Jh@�ÌÖ�h³M¥ ØMBv�h>?³MH@�¶>?I�Bv�ÍÏÐ@ÍJCBM�h@�³PIÃJh´�9�¡ØP³M=?H;Jh>?³PIóMÌXJh´�^ >A@h±³MÌ�Î=?BMI�¡JCBM�ÍÏÃ�d¥·¶�ÍÏM³P@.>?@�ËM>AØP�¡I«>?Iª��>AËPH�Í�d@ ÇìP+;Ù;��BM°L´«³MÌ�Ñ8´>A°L´¾Î;�h³nØ:>? �¡@8BE@h>? ;� � ¶KÏ � @Í>? ��Ø:>A�¡Ñ"³MÌJC´;�h�d�Ð@Í>?¥EH=?BvJC>A³PI@8JC´�BfJ(´�B�ØP�ÐJ*ѵ³«³MÌ�JC´�kÌÖ³PH;��@ÍJh�d=?=?BM��Î�Bv�CBM¥��¡Jh�d�h@U� ÕÙ �Ý/Ù �nÝ�ÙÅÜdÝ��^>?IÒ°d³M¥Ã¥�³PI�F��>AËPH�h� ^@Í´³nÑ8@�Jh´�µ�UØP³P=AH;JC>A³PIE³MÌ�Jh´�h�¡��@ÍÏ:@�JC�d¥�@ÕÌÖ�h³M¥ % �¡J/¤YÙv�dBM°L´kÑ8>AJC´� � á;F è �]D�� � D�� � á;F èDIH���BMI  �Ý � åMáY¤8âÇF;í.´��@Í>?¥EH;=ÊBvJh>?³PI@� >�ÛX�¡��³MI=AÏ�>?IÃJC´�+@ÍJC�¡=?=?BM���¡°d°¡�dIKJC�Í>?°d>�JC>A�d@���BMI �Jh´�d�Í�¡ÌÖ³P�Í�Î[�d�h>?BM@ÍJh�CB.� � �nÝ � áxF $Pè�BMI ½Ü�Ý � èk¤8â ��"�h@ÍJ+°d³M=?H¥�I��UÙ �nÝ � á;FG+KåPèÐBMI ½Ü�Ý � $xF èk¤8â ��¥�>? ; =?�°d³M=?H¥�I��UÙ;BMI  �nÝ � á;F èEBMI ¾Ü�Ý���ßnák¤8â �ÖJh´>?�Í ª°d³P=AH¥�I��UF/í.´�$Jh�d¥�Î�³P�hBM=X�UØP³P=AH;JC>A³PIª³MÌ¿Bk@h>AIËP=?�@h>A¥EH=?BvJC>A³PI¹>?@Ç@h´³nÑ8I»Ñ8>�JC´»¶;=ÊBM°L±¹@h³M=?>? ~°d>A�h°¡=?�d@(Ñ8´>A°L´ �h�¡Î�h�¡@h�dIKJT��BMI  Bv�h��Î;�h³PÎ[³P�ÍJh>?³PIBM=�JC³.�(JC´;�¶[³x >A�d@�>AI�JC´;�� >?@ͱ�F�¤+  >�JC>?³MI�BM=?=�ÏPÙPJh´��=ÊBv@ÍJ.�ͳ�Ñ"@Í´³nÑ8@8Jh´�#"�IBM=�Î=?BMI�¡JCBM�ÍÏ�@�Ïx@�JC�¡¥Ã@.JC´BvJ�ÌÖ³P�Í¥Ã�¡ >?I�媳MJC´;�d�(�h�dBM=?>Y4�BvJh>?³PI@^³M̵Jh´�Ð@CBM¥��Ð@ÍÏ:@ÍJh�d¥ ��@Í´³nÑ8I�Ñ8>AJh´�ËM�CB�ϹBMI �³PÎ[�dI~°d>?�Í°d=A�d@$>?I���>AËPH�h�¡@ ì +.�¦F �*I¹Jh´� "��Í@ÍJ$J*Ñ�³ª°d³P=AH¥�I@�³MÌ���>AËPH�Í�_ ;Ù�¶;>?I�BM��Ïp@�Ï:@ÍJC�¡¥Ã@�Ñ8>�JC´ÒÜdÝ���èä8â BMI  $�¤8âÇÙXJC´;�@ÍJh�d=A=ÊBM�¿°d³P¥�Î�BMI>A³PIYJh�hHI;°�BvJh�d@ÕJC´;�. >?@ͱÇJh³�Ñ8>AJC´;>?IÐå^¤8â��dBM�h=�Ï·>AI·JC´;�.@h>?¥·H=ÊBvJh>?³PIXFÅí.´�.´>?ËM´E¶>?IBM�ÍÏ@ÍJCBM�9�d°d°¡�dIKJC�Í>?°¡>AJC>A�d@9@ÍJh>?�9HÎp¶[³MJC´¾JC´�ÇÎ=?BMI�¡Jh�d@Í>?¥ÃBM=?@9BMI ½�d¥E¶;�ÍÏP³M@dÙ[�d@hÎ[�d°¡>ÊBM=A=AÏ-Jh³nÑ�BM�Í @+Jh´�·³MH;JC�¡��d ;ËP�Y³vÌ�JC´;�Ç ;>?@h±�F�¤^¥�³PIËÐJC´�$JC´;�h�d�Ç�h�dBM=?>Y4�BvJh>?³PI;@�³MÌ�Jh´�ÇÜ�Ý � èk¤8â @ÍÏ:@ÍJh�d¥¾Ù[ëPá���³MÌ¿JC´�Ç>?I>�JC>?BM=¥ÃBM@h@.³PI¾B�ØP�¡�CBMËM��Ñ�BM@8Î[�d��JCH�Ͷ��¡ ¾Jh³EÑ8>AJC´;>?I«á;F�ß$¤8â ³MÌ�JC´�$°¡�dIKJC�hBM=Å@ÍJCBM�dÙ�BvI ¾BMI¾BnØM�d�hBMËP�(³MÌ� ;ß �

Page 12: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìpß�åÇì

³MÌ�JC´�9>?I>�JC>?BM=; >A@h±E¥ÃBM@Í@�ѵBM@���ÓÍ�d°UJC�¡ �ÌÖ�h³P¥æJC´�9@ÍÏ:@ÍJh�d¥ ��@Í�d�+°d³P=AH¥ÃI;@9ß�áYBMI; ½ßPß9³MÌXí�BM¶;=?�/ .�UF�í.´��h�¡¥�Bv>?I>AIËY¥ÃBM@Í@µÑ�[email protected]°d°¡�h�UJC�d «>AIJh³-ß$³P��å "�I�BM=�Î=ÊBvI�¡Jh@dÙxÑ8>�JC´-@Í�d¥�>?¥ÃB�ÓͳP��BfÔx�d@ �

�çyá;FK$Y¤8âYÙx³PI

JC>A¥Ã�¡@h°dBM=?�¡@.³MÌ/ä åvá·ìªèMáUQ¾Ï:�¡Fí.´�Y¥Ã>A  =?�(°¡³P=?H¥�I¾³MÌ���>AËPH�h� �@h´³nÑ8@^Jh´�YÜdÝ � $xF è�¤8â � �nÝ � á;FG+KåPè,��@ÍÏ:@�JC�d¥¾ÙX>AI¾Ñ8´;>?°L´

BMI B�ØM�d�CBvËP�p³MÌYä ��� ³vÌ$JC´�½¥�BvJh�d�Í>ÊBM=�ѵBM@-=A³P@ÍJÃ>?IKJC³~JC´�½°d�¡IJh�CBM=9@ÍJCBM�dÙ8BvI ã³PI=�Ï �� ³MÌ$JC´;�>?I;>AJC>?BM=:¥�BM@Í@/Ñ�BM@���ÓÍ�¡°¡Jh�d �ÌÖ�ͳP¥æJh´�+@�Ï:@ÍJC�¡¥½F�Q¾³P@ÍJ�³MÌ�JC´�9BM°¡°d�h�UJC>A³PI�ѵBM@�°d³P¥�Î=A�¡JC�.¶KÏÃä ßnáPá Q¾Ï:�¡Ù�h�¡@hH=�JC>AIË«>?I¹JC´�ÐÌÖ³P�h¥ÃBvJh>?³PIÒ³MÌ.å�ì «Î=ÊBMI;�¡JC@$Ñ8>�JC´��

�ç'ßPFK «¤8â �ÖJC´;��=?BM�hËM�d@ÍJYBMÎBM@ÍJh�h³PI~³MÌ.BvIÏ

Î=?BMI�¡J9>AI«Jh´�(@h�UJ+ѵBM@ ����ßPF ëä8â#�UF �*I½Jh´�(Ü�Ý ��ßná�¤8â ��BMI  �nÝ �yá;F è,��@h>A¥EH=ÊBfJC>?³MI@dÙx@h´³nÑ8I

>?I¹JC´;�ÃJC´;>?�h ~°d³M=?H¥�I�³vÌ8��>?ËMH�h�U ;Ù�JC´�Ã�d°¡°d�dIKJh�h>?°¡>AJh>?�d@dzMÌ�Jh´��¶�³: >?�¡@Y>AI~Jh´�� ;>?@h±¹Bv�h��Î��¡�ÍJCH;�h¶[�d JC³p´>?ËP´�ØMBv=?H�¡@dÙÕÑ8´>A=?�ÃJh´�- >A@h±~�UÔ:JC�¡I @kJC³Ò¶[�¡ÏM³PI 1åp¤8â�Ñ8>�JC´>AI»JC´;�P"��h@�J�åMá�Q¾Ï:�¡F �*I Jh´�d@Í��hH;I@dÙ[BMI¾B�ØP�¡�CBMËP�dzMÌÕäL ;ß �é³MÌ�Jh´�(>?I>�JC>ÊBv=�¥ÃBM@h@.>A@8=?³P@�J.>?IKJC³kJh´�(Î�h>A¥�BM��Ï-@�JLBM�¡Ù[ä å ��>A@9�*ÓÍ�d°UJC�d XÙBMI  åp³P�_ £Î=ÊBMI;�¡JC@k�Í�d¥ÃBM>?I�Ñ8>AJC´;>?I �

�ç ßMFK1£¤8âÇFÕí.´�ªÌÖ�CBM°UJC>A³PI ³MÌ9¥ÃBM@h@·Jh´�BvJа¡³P¥ÃÎ[³P@Í�d@EJC´;�

=ÊBv�hËP�¡@ÍJ+Î=ÊBMI;�¡J�Ù��� ��°¡³P=?H¥�I óMÌ�í¿BM¶=A� .�¦Ù� ;�d°d�Í��BM@Í�d@�Ñ8>�JC´p>AI°d�Í��BM@Í>?IËÃÜ�Ý �mÌÖ�h³P¥ á;F�Kè·ì½á;F è� Ã>AIJC´;��@ÍÏ:@ÍJh�d¥�@8@h´³nÑ8I«>?I«��>AËPH�Í�\ .�¦ÙBMI ª>A@�BMIKJh> � °¡³P�h�Í�d=?BvJC�¡ �Ñ8>AJh´�JC´�$IH¥·¶��¡��³MÌO"�I�BM=�Î=ÊBvI�¡Jh@µJC´�BfJÌÖ³P�Í¥½F/í.´�Ç¥ÃBMËPI>�JCH �$³vÌ�JC´;�Ç@ÍÎ��¡°d>)"�°Y�¡I�d�ÍËMÏ«³MÌ�JC´�ÇÜ�Ý �yèxÙ�$xF èxÙ�BMI; �ßnáФ8â @ÍÏ:@ÍJh�d¥�@+>AI°d�Í��BM@Í�¶KÏ $�+��-Ùë, ��-Ù�BMI  ;ß �-Ù�Í�d@ÍÎ��¡°¡JC>�ØP�¡=AÏPÙÑ8´;>?=?�+JC´�$@ÍÎ��¡°d>Y"°YBvIËPH=?BM�µ¥�³P¥��dIKJCH¥�³MÌ�JC´�¡@h�(@ÍÏ:@�JC�d¥�@ �¡°d�h�dBM@h�ǶKϽå���-Ù�ß �ªÙ�BvI ¹ß� ���ÌÖ�ͳP¥�Jh´�d>A�.³P�h>AËP>?I�Bv=[ØvBM=AH�d@2��°¡³P=?H;¥ÃI@$ßnåÐBvI ¹ß� �³vÌ�í¿BM¶=A� .�UF

��>AËPH�h�$ë�@h´;³�Ñ8@9JC´�Í�d�Ç@h>A¥EH=ÊBfJC>?³MI@�ÌÖ�ͳP¥ % �UJ^¤ Ñ8>AJh´¾Jh´�(@CBM¥��(@ÍJh�d=?=?BM�.Î[�d�h>?BM@ÍJh�h³PI«ÜdÝ �L$xF è¤8âYÙv¶H;J/Ñ8>�JC´E >�ÛX�¡�h>AIË+ØvBM=AH�d@Õ³vÌ=� �ÝÕÙ �nÝ��¦F �*IEJh´� "��Í@ÍJ�°d³M=?H¥�I�ÙM>AI·Ñ8´>A°L´ �:Ý � ßná^¤8âãBMI;  �nÝ �á;F åPèxÙJC´�+Î=ÊBvI�¡Jh�d@h>A¥�Bv=?@�BM�h�+´>?ËM´=AÏk�¦Ôx°d>AJh�d �ÙxÏP�¡J�¥Ã³P@�Jµ³vÌ�JC´�+=ÊBM�ÍËP�d���d¥·¶�ÍÏM³P@�>?I�JC´�+ >?@ͱÐ�h�d¥ÃBM>AIÑ8>AJh´ �

�ç áxFAßkÑ8>AJh´>?I£Jh´�_"��Í@ÍJ(ÌÖ�¡Ñæ¥Ã>A=?=A>?³PI«ÏP�dBM�h@¡F �*I~Jh´�k¥Ã>A  =A�kBMI  "�I�Bv=Õ°d³P=AH¥�I�Ù�>?I£Ñ8´;>?°L´

JC´;�E@h�¡¥Ã>A¥�B�ÓͳM�+B�Ô;>A@�BMI; £JC´�Y�d°d°¡�dIKJC�Í>?°¡>AJ*Ï � �ÝÕÙ �nÝO�^BM�Í�·¶[³MJC´£>AI°d�Í��BM@Í�d £Jh³��VåMáä8âYÙ�á;FK+PåPè,�+BvI ��ëPá-¤8âYÙÅá;FG1;ß�åMè,�UÙ��Í�d@ÍÎ��¡°¡JC>�ØP�¡=AÏPÙÅJh´�k¥Ã³M�h�E¥ÃBM@h@Í>AØM�k�d¥E¶��ÏP³P@ÇBM�Í�kBM=A@h³ª�UÔx°¡>AJC�¡ ~Jh³ª´>?ËM´£ØMBv=?H�¡@�³MÌ��FÕí.´�.Jh³MJLBM=;¥�BM@Í@/JC´�BvJ/ѵBM@�=?³P@�J�>?@/°¡³P¥ÃÎBM�CBM¶;=?�.BM¥�³PIË$Jh´�.JC´�Í�d�8@h>A¥EH=ÊBfJC>?³MI@dÙKBvI �BM=?@ͳYBv¥Ã³PI;Ë

JC´;�$BM  >�JC>A³PI�BM=��Í��BM=A>X4�BfJC>?³MI@�³MÌÅJC´�9JC´�Í�d��@�Ï:@ÍJC�¡¥Ã@.@Í´³nÑ8I«>?I-�¿>?ËPH�Í�+ë �Õë �� ³PI«B�ØP�¡�CBMËM�^Ñ8´�dI �Ý��ßnáФ8âYÙ[ë.1��éÌÖ³P� �:Ý � åMá�¤8âÇÙ[BMI ÒèMå ��ÌÖ³P� �Ý �yëKáФ8âYF�í.´�Y¥Ã³P�Í�$�d°¡°d�dIKJh�h>?°Y¶>?IBM�ÍϪ@�JLBM�Í@JC�¡I ÃJh³Y@�JC>A�/HÎÃJh´�8³PH;JC�¡���¡ ËP�8³MÌ�JC´�9 >?@ͱE@hH;°L´�JC´�BfJ�¥�³P@�J�³MÌXJh´�8¥�BM@Í@�Jh´�BvJ�>?@/=A³P@ÍJ�>A@/Î��¡�ÍJCH;�h¶[�d JC³ÇÑ8>AJh´>?IÃá;F�ß^¤8â ³vÌ�JC´�+Î�h>A¥�Bv�ÍÏk@�JLBM� �;BMÎ;Î�h³�Ôx>?¥ÃBvJC�¡=AÏ>1På � BMI 9+Pè �y³MÌ�Jh´�^¥ÃBM@h@�JC´BvJ�ѵBM@�=A³P@ÍJ>?I«JC´;�Ç@Í�d°¡³PI  � �:Ý � åMáФ8âYÙ �nÝ �yá;FG+KåPè���BMI ½Jh´>?�Í  � �Ý �æëKáФ8âYÙ �nÝ �æá;FK1xß�åPè,�µ@Í>?¥EH=?BvJC>A³PI@ѵBM@�Î[�d�ÍJhH�h¶[�d Ò>AIKJC³�Jh´�E°d�¡IKJC�CBv=�@ÍJCBM�dÙ[Ñ8´�d�Í��BM@ 1Má��׳MÌ/JC´�·¥�BM@Í@^=A³P@ÍJ^>?I½Jh´�E@Í>?¥EH=?BvJC>A³PI¾@h´³nÑ8I>?I Jh´� "�h@ÍJÃÎ�BMI;�d= � �Ý � ßná~¤8âÇÙ �nÝ � á;F åPè,�·ÑµBM@���ÓÍ�d°UJC�¡  ÌÖ�h³M¥ JC´�¾@ÍÏ:@�JC�d¥¾F�¤+=AJh´³PHËP´ JC´;�JC³vJLBM=Å°L´�BvIËP�Ç>?I«�dI�¡�hËMϾBvI pBvIËPH=?BM�.¥Ã³M¥Ã�¡IJhH¥×³MÌ¿��Bv°L´p@ÍÏ:@�JC�d¥ >A@9°¡³P¥�Î�BM�CBv¶=?�vÙ;ÌÖ�¡Ñ��d�9Î=ÊBvI�¡Jh@ÌÖ³P�Í¥½ÙKÑ8>AJh´�Jh´�^³MH;JC�¡�h¥�³P@ÍJ�Î=ÊBvI�¡J�°d=A³P@h�¡��Jh³YJh´�^°¡�dIKJC�hBM=�@ÍJLBv�dÙÌÖ³P��¶;>?I�BM��ÏÐ@ÍJCBM�h@�³PI�¥�³P�Í�+�¡°d°d�¡IKJC�h>A°³P�Ͷ>AJh@dF^í.´;�E�¡Û��d°UJ$³MÌ�B�¥�³P�h�Y�d°¡°d�dIKJh�h>?°·¶>?I�Bv�ÍϾ@ÍJCBM�^@�Ïx@�JC�¡¥ ÌÖ³P�+B�ËP>AØM�dIÒÜdÝ >A@+J*Ï:Î>A°�BM=A=AϾB�¥�³P�h� >�ØP�d�Í@h�¾@h�UJ�³MÌ+Î=?BMI�¡JCBM�ÍÏ @ÍÏ:@ÍJh�d¥�@dÙµÑ8´>A°L´1ѵBM@ÃBM=?@ͳÒJC´�«°�Bv@h�«ÌÖ³P�EJC�¡�h�h�¡@ÍJh�h>ÊBv=.Î=ÊBMI;�¡JkÌÖ³P�Í¥�BvJh>?³PIÑ8>AJh´>?I«BE°¡>?�Í°dH¥E¶;>?I�BM��Ï� ;>?@h±Ã@hH�Í�h³PH;I >?I;Ë�´;>?ËP´=�Ï��d°d°¡�dIKJC�Í>?°(°d=A³P@h�$¶;>?I�BM��Ï�@�JLBM�Í@2��¶H;J8>AI�JC´BvJ8°�BM@Í�JC´;�YBvÎ�BM@ÍJh�h³PI«ØvBM=?H;��Ñ�[email protected]´�(Î��¡�ÍJC>AI�dIKJ9Î�BM�hBM¥��¡JC�¡�dÙ�G�H>AIKJLBMI�B �æ²�>A@h@hBMH�d�+åMáMá,+.�UF

Page 13: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìpß� Yì

í.´�Í�d�^@Í>?¥EH;=ÊBvJh>?³PI@¿ÌÖ�h³P¥ % �¡J - �D�� � D�� �yßPF á D H���Ñ8>AJC´ �Ý �æßná(¤8â ��BMI � >AÛ��d�Í>?IË��nÝBMI ÃÜ�Ý��/BM�h�9@h´;³�Ñ8I�>?IÃ��>?ËPH;�h�+èxFÕ¤+=AJC´;³PHËP´ÐJC´�9¶>AI�BM�ÍÏÐ@�JLBM�Í@�>AI % �¡J -�BM�Í�+�dBM°L´�J*Ñ8>?°¡�^Bv@�¥ÃBM@h@Í>AØM�BM@EJh´³P@h�ª>AI % �UJФ·Ù�Jh´�-¥ÃBM@h@k�hBvJC>A³p>?@YJC´�ª@hBM¥Ã� � �� á;F è��·BMI  ÌÖ³P�kB£ËM>AØP�¡I � �Ý/Ù �nÝO�UÙ�³P�EÜdÝ�ÙJC´;�Ç@Í>?¥EH;=ÊBvJh>?³PI@µ >?@ÍÎ=ÊB�Ϫ@Í>?¥�>?=ÊBv��Jh�h�dI; @ ����>?ËPH;�h�(è,�[email protected]´³P@h�(ÌÖ�h³M¥ % �¡J9¤ �a�¿>?ËPH�Í� .�UF �+³vJC�$JC´�BfJ³PI=�ϪJC´�Í�d� "�I�BM=�Î=?BMI�¡JCBM�ÍÏ«@�Ï:@ÍJC�¡¥Ã@ �ÖÌÖ�h³M¥×JC´�Í�d�·�Í��BM=A>X4dBvJC>A³PI@.°L´³P@Í�dI¹BvJ+�CBvI ³P¥P�.BM�h�Ç@h´³nÑ8IÒ>AIJC´;�Ç=?BM@ÍJ8�ͳnÑ7³MÌ¿��Bv°L´p°d³M=?H¥�Iª>?I¾��>AËPH�h�¡@9èkBMI  +;Ù��¡ØM�dI¾JC´³PH;ËP´ªÌÖ�h³P¥ ßnáYì MáÐ>AIKJC�dËM�CBvJh>?³PI@�Ñ��d�Í�Î[�d�ÍÌÖ³M�h¥��d �ÙK>AIk³P�h �¡�/JC³$ �¡¥Ã³PI;@ÍJC�hBvJC�.Ñ8>�JC´k°d=?BM�h>�J*Ï·Jh´�. >AØM�d�Í@h>AJ*ÏE³MÌW"I�BM=Î=?BMI�UJC@�BM¥�³PIË$�dBM°L´Ã@Í�¡JdF��³P�/@h>A¥EH=?BvJC>A³PI@¿Ñ8>�JC´ÐÜ�Ý �7è�¤8â � �Ý�� ß�á(¤8â BMI;  �nÝ �7á;F è,�UÙBMIÃB�ØP�¡�CBMËP�8³MÌ ,+�� ³MÌ�Jh´�8>?I>�JC>?BM= >A@h±�¥�BM@Í@µÑµBM@.=?³P@�JµJh³·JC´�$°¡�dIKJC�hBM=X@�JLBM�¡Ù�BMI ¾å ��yÑ�BM@.�*ÓÍ�d°UJC�d ªÌÖ�ͳP¥�Jh´��@�Ïx@�JC�¡¥½F �*IªJC´�·ßná·�hH;I@³MÌ�Jh´>?@(@�Ïx@�JC�¡¥½Ù�ÌÖ�ͳP¥ ßÐì~å«Jh�d�h�Í�d@�JC�h>?BM= � ¥�Bv@h@$Î=?BMI�¡Jh@ÇÌÖ³M�h¥��d �Ñ8>�JC´�� � � ß�¤8â�³v̵JC´;��°d�¡IKJC�CBv=@ÍJCBM�dFÕÉ��$Î[�d�ÍÌÖ³M�h¥��d ªBMIª�¡I@h�¡¥E¶=A�$³MÌ� Pá·>?IKJh�dËP�hBvJC>A³PI@�ÌÖ³M�.B·@ÍÏ:@�JC�d¥×Ñ8>�JC´-ÜdÝ�� $xF è·¤8âYÙ �Ý�� ßná¤8âYÙ;BMI  �nÝ � á;F åPèÇ@�Ï:@ÍJC�¡¥½ÙxJC´�Í�d�^³vÌÅÑ8´>?°L´«BM�Í�^@Í´³nÑ8Iª>?IÃJh´��¥�>?  ;=?�8°d³P=AH¥�I�³MÌ���>AËPH�Í��èxF�í.´�B�ØP�¡�CBMËP�·Î��¡�h°d�¡IKJLBMËP�·³MÌ/¥ÃBM@h@9JC´�BvJ+Ì�BM=?=A@.Ñ8>AJC´;>?I£áxFAßY¤8ây³MÌÕJh´�·@�JLBM�+>?@·ß�á��-Ù�°¡³PI@h>A@ÍJh�dIKJ�Ñ8>AJh´pJC´;�BMI�Bv=?³PËP³MH@��ÍHI@µÌÖ�ͳP¥ % �¡J�¤·ÙÑ8´�d�Í��BM@�Jh´�^¥ÃBM@h@µÎ��¡�ÍJCH;�h¶[�d ª³PH;Jµ³MÌ�Jh´��@ÍÏ:@�JC�d¥�>?@�@h³P¥��¡Ñ8´�BfJ�=?�¡@h@¡Ù Pá�� ³PI¾B�ØP�¡�CBMËP�vF/É >AJC´;>?I�Jh´�\"��h@�J+èMá>Q¾Ï:�dÙxÌÖ�h³P¥ åÇì-è·Î=ÊBMI;�¡JC@�BvJ.=?�dBM@ÍJ.BM@.¥�Bv@h@h>�ØP�(BM@ Q½�d�Í°dH��Ï´�B�ØP�(Bv°d°d�Í�¡Jh�d �ÙÑ8>�JC´«å(ì�è·Î;=ÊBMI�UJC�¡@h>?¥ÃBM=A@��Í�d¥ÃBM>?I>AIËÇ>?I-�dBM°L´«@ÍÏ:@ÍJh�d¥×³PIª´;>?ËP´=�ÏÐ�d°¡°d�dIKJh�h>?°$³M�h¶>�JC@dF���h³P¥ ß9ìÐë "�I�BM=[JC�¡�h�h�¡@ÍJh�h>ÊBv=�Î=?BMI�UJC@�ÌÖ³M�h¥��d ��mÑ8>AJC´-BMIªB�ØP�¡�CBMËP�$³vÌ�åxFG1.��Ñ8>�JC´ �

�çéßPFK1Y¤8â7³MÌÅJC´;�

Î�Í>?¥ÃBM�ÍÏ^@ÍJLBv�dF�í.´;�µ@h³M¥Ã�UÑ8´�BvJ¿=?�d@Í@¿¥ÃBM@Í@�Jh´�BvJ�>?@�=?³M@ÍJ�>?I % �¡J=-~°¡³P¥�Î�BM�h�¡ YÑ8>�JC´YBMI·>A �dIKJC>A°�BM=K³M�h¶>�JLBM=Î�BM�hBM¥��¡JC�¡��@ÍÏ:@ÍJh�d¥ ÌÖ�h³P¥ % �¡J�¤ °dBMI�¶��9�UÔxÎ[�d°¡Jh�d �Ù;BM@�BM=AJh´³PHËP´Ð@�JC�d=A=ÊBM�/Î[�d��JCH�Ͷ�BvJh>?³PI@�BM�Í�+ ;>?�h�¡°¡Jh=AÏ@h°dBM=?�¡ �Ù�Î=ÊBMI;�¡JLBv�ÍÏÒÎ[�d��JCH�Ͷ�BvJC>A³PI@ÇBM�Í���Í�d=?BvJC>�ØP�d=�ÏÒ=?�¡@h@(@h>AËPI>)"�°�BMIKJÇ>?I % �UJ - @h>AI°d�kJC´;�Ã¥ÃBM@h@(�hBvJC>A³³MÌ�JC´�ÐÎ=?BMI�UJ�JC³ªJC´;��@�JLBM�$>A@$@h¥ÃBM=?=A�d�¡ÙXÑ8´>?°L´~�h�¡@hH=�JC@$>AI~=A�d@Í@Ç>AIKJC�d�ÍI�BM=Õ�¦Ôx°d>AJCBvJC>A³PI ��@Í�d�Ф^Î;Î��¡I >�Ô¢ ³MÌ�G$H;>?IKJLBMIB � ²Å>?@Í@CBMH;�d�$åváPá,+kÌÖ³P�9Bà>A@h°dH;@h@h>A³PIp³vÌ/@h°dBM=?>AIËÃÎ;=ÊBMI�UJLBM��Ï«BM°¡°d�h�UJC>A³PIp@Í>?¥EH=?BvJC>A³PI@8�UF�*I«@h>A¥EH=ÊBfJC>?³MI@�ÌÖ�ͳP¥ % �UJ/- Ñ8>�JC´ª=?BM�hËP�¡��Î[�d�h>?BM@ÍJh�CBE³MÌ¿Ü�Ý���ßnáE¤8â � �:Ý���ßnáE¤8âÇÙ �nÝ � á.�UÙx@hH°L´BM@ÇJC´³P@Í�-@h´;³�Ñ8I >AI»JC´;�ÃJC´;>?�h »°d³P=AH¥ÃI�³MÌ8��>AËPH�Í�-èxÙ¿ÌÖ�h³P¥ åªì~è½Î=ÊBvI�¡Jh@YÌÖ³P�Í¥!Ñ8>�JC´ @Í�d¥�>?¥ÃB�ÓͳP�BfÔx�d@ÇJC´�BfJ·�¡I°d³P¥�Î�BM@Í@YJh´��ÌÖH;=?=/�CBvIËP��³MÌ�JC´;�Ã>AI>AJh>ÊBM=¿ >?@ͱ[Ù�BMI ��¡ØP�¡I ¶��UÏP³PI;  徤8â ��³PI;�ÃÎ=?BMI�UJ�h�¡¥�Bv>?I�¡ £Ñ8>AJC´ �

���å:F $�1,�UÙXÑ8>�JC´~å�+�� ³MÌ�JC´�k>AI>AJh>ÊBM=Å ;>?@h±½¥�Bv@h@$=?³M@ÍJ^Ø:>?B-��ÓÍ�d°UJC>A³PI�FÇí.´�Р>?@ͱ½>A@

@h=A>?ËP´KJh=AϽ¥Ã³P�Í�EJC�ÍHI°�BfJC�d ~>?I¹@Í>?¥EH=?BvJC>A³PI@9ÌÖ�h³P¥ % �¡J2-àÑ8>AJh´~ÜdÝ � ß�᫤8âÇÙ �Ý ��ëK᪤8âéBMI  �nÝ�éá;F $Mè ��I³MJ�@h´³nÑ8I��¦Ù¿BvI £ÌÖ�h³P¥ ßYì½ë«Î=ÊBvI�¡Jh@$BM°d°¡�h�UJC�d ÒÑ8>�JC´ �

�� å�¤8â ¶KÏpJh´�k�dI; ~³vÌ�Jh´�d@Í�

>?IKJh�dËP�hBvJC>A³PI@dF��>AËPH�h�2+ÃÎ;�h�d@Í�dIKJC@�Jh´�·�UØP³P=AH;JC>A³PIp³vÌÕJC´�Í�d�E@Í>?¥EH;=ÊBvJh>?³PI@�Ñ8>�JC´pJh´�·@hBM¥��Y³P�Ͷ>AJCBM=�Î�BM�hBM¥Ã�UJC�¡�h@dÙ

�Ý �éßnák¤8â BvI  �nÝ��æá;F åPè ��ÜdÝ � $xF èE¤8â#�UÙ�¶H;J9�¦ÔBv¥Ã>AI�d@�Jh´�(�¡Û��d°¡J9³MÌ¿ >�ÛX�¡�h�dIKJ9@ÍJh�d=A=ÊBM��¥ÃBM@Í@�CBfJC>?³M@dF��*I-Jh´�\"��h@�J8°d³P=AH¥�I�Ù:Jh´�$°d�¡IKJC�CBv=�@ÍJCBM��´�BM@�BE¥�BM@Í@�³MÌ¿á;F è DIH�Ù;BMI ¾B-ß DIHÒ@ÍJCBM��Î[�d��JCH�Ͷ@JC´;�Y >A@h±�Fµ¤+¥Ã³MIË�Jh´>?@8@Í�¡J�Ù[BMIpB�ØP�d�hBMËP�dzMÌ0$Må ��³MÌ¿JC´�Ç>?I>�JC>?BM=X >A@h±ª¥ÃBM@h@8>A@9°¡=?�dBM�h�¡ ½³PHxJ ��BM=?=�³vÌÕ>AJ>?IKJh³E>?IKJC�¡�h@�JC�d=A=ÊBM��@hÎBM°d�C�UÙ�BMI; -JC´���Í�d¥ÃBM>?I;>?IËY¥�BM@Í@µ>A@�BM°¡°d�h�UJC�¡ ¾>AIKJC³Ðå(ì�ëkÎ;=ÊBMI�UJC@�Ñ8>AJC´ �

�ç�ßPF�ß

¤8âYFxí.´�$¥�>?  =A�8°d³P=AH¥ÃI�@h´³nÑ8@�JC´;�h�d��BM  >�JC>?³MI�BM=�@h>A¥EH=ÊBfJC>?³MI@/ÌÖ�h³P¥ JC´;��Ü�Ý � $xF èǤ8â � �Ý � ßná¤8âYÙ �nÝ �àá;F åPè,��@�Ï:@ÍJC�¡¥�ÌÖ�ͳP¥ % �¡J!- JC´BvJµ>A@µ@Í´³nÑ8Iª>?IÃJh´�^¥�>? ; =?�8°d³M=?H¥�IóvÌ���>?ËPH;�h�+èxÙ:>?IÃÑ8´;>?°L´ä ëKá���³vÌÕJC´�Ç>?I;>AJC>?BM=[¥�BM@Í@+>A@8=?³P@�J+³MI£B�ØP�¡�CBMËP�vF�í.´� "�I�BM=Å°¡³P=?H¥�I¾@h´³nÑ8@�B�@h>A¥EH=ÊBfJC>?³MI�Ñ8>AJh´½JC´;�

Page 14: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìpß�ë·ì

 >A@h±�°¡�dIKJC�¡�h�¡ pBM�ͳPHI «Bªß DIHÒ@�JLBM�µÑ8>�JC´«Bká;F è DIHÒ@ÍJh�d=A=ÊBM��°d³P¥�Î�BMI>A³PI�F��*IªJh´>?@�@Í�¡J8³MÌ��ÍHI@�Ñ8>AJh´ � ß�&� ;ÙxBMI«B�ØP�¡�CBMËP�$³vÌÕå +��é³vÌ�Jh´��>AI>AJh>ÊBM=� >A@h±Ã¥�BM@Í@�>?@�=?³P@�J ��¥�³P@�J�³MÌ�>AJµ>?@�Î[�d��JCH�Ͷ��¡ -JC³EÑ8>�JC´>AIá;F�ßk¤8âæJC´;�E°d�¡IJh�CBM=�@ÍJLBv�w�UÙ�BMI � -³P��ë�Î=ÊBMI;�¡JC@�BM°d°¡�h�¡Jh�EÑ8>AJh´ �

�ç ßPFG1�¤8â >?I£�dBM°L´¹@h>A¥EH=ÊBfJC>?³MI�F

í.´>A@^°d³MI'"�ËPH�hBvJC>A³PIp@�JLBvJh>?@�JC>?°dBM=?=�Ï-´�Bv@+JC´;�·@CBv¥Ã�Ç�¡Û��d°UJ$³PI½Jh´�· ;>?@h±¾BMI; pJC´�Y�h�¡@hH=�JC>?I;ËÃÎ=?BMI�UJC@�Bv@¯MHÎ>�JC�¡�8BMI  % BvJCH;�hI¾ ³Ã>AI¾BMI�BM=A³PËP³PH@µ@h>?¥·H=ÊBvJh>?³PI;@�³MÌ�JC´� % ³P=?BM� % Ï:@ÍJh�d¥?�a¢µ´�BM¥E¶[�d�Í@ SU_�QMe)( åváPá;ßPÙG�H>?IKJCBMI�B �7²Å>A@h@CBvH�d��åMáMá,+.�UF �+³vJC��JC´BvJ/JC´��Jh�d¥�Î�³M�CBM=x�¡ØP³M=?H;Jh>?³PIk³MÌ[¥�³P@ÍJÕ>?I >�Ø:>? H�Bv=x@Í>?¥EH=?BvJC>A³PI@ÌÖ�h³M¥ % �UJC@9¤ BMI T- BM�Í�$Î�h�¡@h�¡IJh�d £>AI½G$H;>?IKJLBMIBT�aåMáPáMë.�UF

�O�!� � � �@� �� � �� ���.�� ���  � h�4� �

¤^@9 �¡@h°d�Í>?¶[�d ¾>?IªJC´;�YÎ�Í�¡Ø:>?³MH@8@h�d°UJC>A³PI�ÙJC´;�Ç@�JC�¡=?=ÊBv�.¥�BM@Í@8�CBvJh>?³ÐBMI «JC´;�ÇÎ[�d�Í>ÊBM@�JC�ͳPI½ ;>?@ÍJCBMI°¡�@ÍJh�h³PI;ËP=AÏÒ>AI���H�¡I°d�ÐÑ8´�¡�h�ÃJh�d�Í�h�d@�JC�Í>ÊBM=/Î=?BMI�UJC@(°�BMI~ÌÖ³P�h¥ >?I¹¶>?IBM�ÍÏÒ@�JLBM�Ç@ÍÏ:@�JC�d¥�@dF�í.´�Ã�UÛX�¡°¡JY³MÌÜ�Ý ³PI~Jh´�Р>?@�JC�Í>?¶H;Jh>?³PIÒ³vÌ "�I�Bv=/Î=ÊBMI;�¡JLBv�ÍÏ£@�Ï:@ÍJC�¡¥!Î�BM�CBv¥Ã�UJC�d�Í@3��>VF �MF�Ù�IH¥E¶[�d�dÙ�¥ÃBM@h@Í�d@dÙ��¡Jh°MFK�1>A@ÌÖH��JC´�¡���¦Ô;Î;=?³P�Í�d ->AI�Jh´>?@�@h�¡°¡JC>A³PI�F���>AËPH�Í�#$$ >A@hÎ=?BnÏ:@�JC´�9 >?@�JC�Í>?¶H;Jh>?³PIгMÌ�Î=ÊBMI;�¡JLBv�ÍÏÐ�d°¡°d�¡IJh�h>A°d>AJh>?�¡@BMI ~@h�¡¥Ã>A¥�BnÓͳP�(BfÔx�d@(ÌÖ³P�ÇBM=?=�³MÌ�Jh´�>"�I�BM=�Î=?BMI�¡Jh@$ÌÖ³P�h¥��d ¹>?I~� � H�Bv= � ¥ÃBM@Í@$¶>?I�Bv�ÍÏÒ@�Ïx@�JC�¡¥Ã@¡Ù¿Ñ8>AJh´@ÍÏ:¥E¶[³P=9@h>Y4d�d@�Î�h³PÎ[³P��JC>?³MI�BM=.JC³ Î;=ÊBMI�UJ�@Í>X4¡�d@dÙ.Ñ8>�JC´ãÜdÝ �!è�¤8â �ÖJC³MÎãÎ�BMI�¡= �¦ÙB$xF è�¤8âJ��¥�>? ; =?�Î�BMI;�d= �¦Ù:BMI pß�áY¤8â ��=?³nÑ��d��Î�BMI�¡= �¦F % Ï:@ÍJh�d¥�@�Ñ8>AJh´9D ��� D�� �àáxF è DIHF� % �¡Jµ¤���BM�h�8�Í�dÎ�Í�d@h�¡IKJC�d >?I¹�Í�d �Ù�Ñ8´>?=A�k@ÍÏ:@ÍJh�d¥�@ÇÑ8>�JC´ D�� � D�� � ßPF áTD H � % �¡J2- �$BM�Í��@Í´³nÑ8I»>AI~¶;=?H�vF�¤+=AJh´³PHËP´¹JC´;�>?I;>AJC>?BM=�Î;=ÊBMI�UJC�¡@h>?¥ÃBM=A@w&v�¡¥E¶�ÍÏM³P@Ç>?I¹JC´�à>?@ͱҶ��¡ËP>?I~Ñ8>AJC´�@h�¡¥Ã>A¥�B�ÓͳM�(BfÔx�d@YJh´�BvJY�UÔ:JC�¡I  ³PH;JÇJC³£å¤8âYÙ;BM=?=[³MÌÅJh´�$Î=ÊBvI�¡Jh@�ÌÖ³P�Í¥Ã�¡ ->?I-@�Ï:@ÍJC�¡¥Ã@.Ñ8>�JC´-ÜdÝ�� è·¤8â7�Í�d¥ÃBM>?I�¡ �Ñ8>AJh´ �

�� á;F�·¤8â7³MÌ�JC´;�

Î�Í>?¥ÃBM�ÍÏ·@ÍJLBv���Í�dËKBv�h =A�d@h@�³MÌ�JC´�2� �Ý/Ù �nÝ��ÕØvBM=AH�d@¡FÕí.´�9@h>A¥EH=ÊBfJC>?³MI@Õ³MÌX@ÍÏ:@ÍJh�d¥�@�Ñ8>AJh´ÐÜ�Ý �M$xF è�¤8â�h�¡@hH=�JC�¡ ¾>AI-JC´��ÌÖ³M�h¥ÃBvJC>A³PI�³MÌ�Jh�d�h�Í�d@�JC�h>?BM= � ¥�Bv@h@µÎ;=ÊBMI�UJC@µÑ8>�JC´>AI�JC´;�$°dH�Í�h�dIKJ9³P�Ͷ>AJµ³MÌ6QpBM�h@ �aä�ßPF è¤8â\�¦FXí.´�_"I�BM=�Î;=ÊBMI�UJC@^ÌÖ³M�h¥��d £>AI£@ÍÏ:@ÍJh�d¥�@�Ñ8>AJh´ÒÜ�Ý � ß�á-¤8ây´�B�ØP�ÐB�Ñ8>A �d�+�CBMIËM�E³MÌ�¶�³vJC´ �

���³MH;JµJh³ÐåxF åY¤8â\�µBvI  ����H;Î-JC³ká;F ëè,�¦FÕí.´���Í�d@ÍH=AJh@µÌÖ�h³P¥ % �UJ.¤àBvI  % �¡J -ãBM�h�+°d³P¥�Î�BM�hBM¶=A�9ÌÖ³P�µB

ËP>�ØP�dIpÜ�Ý/Ù�°¡³PI@Í>?@ÍJh�dIKJ�Ñ8>�JC´½Jh´�·@�JLBM¶;>?=?>�J*Ϫ°d³MI@ÍJh�CBM>AIJh@^ �¡@h°¡�h>?¶[�d p>?I % �d°¡Jh>?³PIÒåxF �+³MJh�YJC´;�·Î>A=?� � HÎ�Ù´³nÑ��¡ØP�¡�dÙ¿³M̵Î;=ÊBMI�UJC�¡@h>?¥ÃBM=A@�>?IÒJC´;��>AII�¡�$�h�dËM>?³PI¹³MÌ�JC´�Р>A@h±£>AI¹@ÍÏ:@ÍJh�d¥�@ÇÑ8>�JC´ D�� � D�� � ßPF áDIH�FÇí.´�k>AII�d�ͥóM@ÍJ�>AI>AJh>ÊBM=�Î=?BMI�UJC�d@Í>?¥ÃBM=�³MÌmJC�¡I¹@hH��Øx>�ØP�¡@Ç>AIKJLBM°UJ^ÌÖ³P� % �¡J - ��>AIpÑ8´>A°L´¹Jh´�E�hBvJC>A³³MÌ�JC´�( >A@h±-¥ÃBM@Í@�JC³�@ÍJLBv�.¥�BM@Í@8>?@.@h¥ÃBM=A=?�d�8�UÙ:¶H;J9I³MJ9>AI % �¡J9¤·F

í.´�$@Í�d¥�>?¥ÃB�ÓͳP��BfÔx>?@�³vÌÅJC´��³MH;JC�¡�h¥�³P@ÍJµÎ=ÊBMI;�¡J.°dBMI-¶[��H@h�¡ ¾[email protected]·¥���BM@ÍH�h�^³MÌÅJC´�^@h>X4¡��³MÌ�JC´;�JC�¡�h�Í�d@ÍJh>ÊBM=[Î=?BMI�¡Jµ@ÍÏ:@ÍJh�d¥¾F���>?ËPH;�h�\1Y@h´³nÑ8@�JC´;�� >?@�JC�Í>?¶H;Jh>?³PIóMÌÅJC´;��@h�¡¥Ã>A¥�B�ÓͳM�µBfÔx>A@µ³MÌÅJh´��³PH;Jh�d� �¥�³P@ÍJ "�I�BM=[Î=ÊBvI�¡JdÙ �

� ����� Ù:ÌÖ³P�h¥��d Ã>?I-�dBM°L´ª@h>A¥EH=?BvJC>A³PI�ÌÖ³M�µ@ÍÏ:@�JC�d¥�@�Ñ8>AJh´-Ü�Ý � èY¤8â �mJC³PÎ�Î�BMI�¡= �UÙ$xF è�¤8âYÙ��Ö¥Ã>A  =?��Î�BMI�¡= �¦ÙBMI «ßná$¤8â ��=A³�Ñ��d�/ÎBMI�d= �UF �+³MJh��JC´�BvJ/J*Ñ8>A°d�9BM@/¥ÃBMIKÏE>AIJh�dËP�hBvJC>A³PI@Õ´BnØM�¶[�d�dIkÎ[�d��ÌÖ³P�h¥��d ·>?I % �¡J0-�Jh´�BMIE>AI % �UJÕ¤·FM��>?ËMH�h� 1^@h´;³�Ñ8@�B+°d=?�dBM��JC�h�¡I  ��BM@¿Jh´��¶>AI�BM�ÍÏÇÎ[�d�Í>ÊBM@�JC�h³MI>?I;°d�h�dBM@h�¡@dÙ;Jh´�$ >A@ÍJC�Í>?¶HxJC>?³MI�³MÌ�@Í�d¥�>?¥ÃB�ÓͳP��B�Ô;�¡@.³MÌÅJC´;�$³PH;JC�¡�h¥�³P@ÍJµÎ=ÊBvI�¡J.¶[�d°¡³P¥��d@µÑ8>A �d�.BvI ª>AJh@�UÔxÎ[�d°UJLBvJh>?³PI~ØMBv=?H��@h´>�ÌmJC@(JC³½=ÊBM�ÍËP�d�$ØvBM=?H;�d@dF«í.´>A@ÇJh�h�¡I  ³MÌ8B¾=ÊBM�ÍËP�d�( >A@ÍJh�h>?¶;H;JC>A³PI¹>?I»@Í�d¥�>?¥ÃB�ÓͳP�BfÔx>?@8ÌÖ³P�9>?I°¡�h�dBM@h>AIËÃÜdÝ >?@+BM=?@ͳ� �¡¥Ã³MI@ÍJh�CBvJh�d p>AI£��>AËPH�Í��xÙ[ÌÖ³P�.Ñ8´>A°L´pJC´;�·³PH;Jh�d�ͥóP@�J^@Í�d¥�>?¥ÃB�ÓͳP�

Page 15: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìpß�èÇì

BfÔx>?@+³MÌ�JC´�2"�I�BM=¿Î=ÊBMI;�¡JC@+>?@+Î=?³MJÍJC�¡ Ò >?�Í�d°¡Jh=AϽBM@$B�ÌÖHI°¡Jh>?³PIp³MÌ�Ü�Ý/F -µ³MJh´£JC´�·�UÔxÎ��¡°¡JCBvJC>A³PI£ØvBM=?H�BMI £Jh´�YÑ8>A ;JC´Ò³vÌ���BM°L´Ò >A@ÍJh�h>?¶;H;JC>A³PI½°¡=?�dBM�h=�ϽËM�h³nÑ ��>AIÒB�I�dBM�h=�Ͻ=A>?I�dBM�8Ì�BM@h´>A³PI��.Ñ8>AJC´p>?I°¡�h��Bv@h>?I;ËØvBM=?H;�d@.³MÌ�¶>?I�Bv�ÍÏ-Î[�d�Í>ÊBM@�JC�ͳPI«Ü�Ý/F

í.´�+ >?@�JC�h>A¶H;Jh>?³PI@�³MÌXJC´�8JC³MJCBM=�IH¥E¶[�d��³MÌ "�I�Bv=[Î;=ÊBMI�UJC@�ÌÖ³P�h¥��d �BM�h�9@h´;³�Ñ8I�>?I-�¿>?ËPH�Í�(ßná(ÌÖ³M�@h>A¥EH=?BvJC>A³PI@�Ñ8>�JC´¾Ü�Ý�� èE¤8â �mJC³PξÎ�BMI;�d= �¦Ù�$xF èE¤8âYÙ���¥�>? ; =?��ÎBMI�d= �UÙ�BMI; ~ß�áФ8â ��=A³nѵ�¡�.Î�BMI�¡= �UF�*I1ËP�dI�¡�CBM=aÙµBÒ@Í¥�BM=A=?�¡�E¶>?IBM�ÍÏ»Î��¡�h>ÊBv@ÍJC�ͳPI �h�¡@hH=�JC@Ð>?I1BÒ=ÊBM�ÍËP�d�kÎ[�d�Í°d�¡IJCBMËP�¾³MÌ+¥�BM@Í@k=?³P@Í@dÙ�BMI  B@h¥ÃBM=A=?�d�/IH¥·¶��¡��³MÌW"�I�BM=�Î=?BMI�UJC@dFÕ���ͳP¥ ß�ìU (Î=ÊBMI;�¡JC@�ÌÖ³P�Í¥Ã�¡ Ã>AI�BM=A=�@ÍÏ:@ÍJh�d¥�@�Ñ8>�JC´�Ü�Ý �àè(¤8âYÙ�ßìªèEÎ=ÊBMI;�¡JC@8�Í�d¥ÃBM>?I�¡ ª>?I«@ÍÏ:@�JC�d¥�@8Ñ8>AJC´«ÜdÝ � $xF èE¤8âYÙ�BMI; �ß^ì9+kÎ=ÊBMI;�¡JC@.ÌÖ³P�Í¥Ã�¡ ª>?I¾BM=A=X@ÍÏ:@�JC�d¥�@Ñ8>AJh´£Ü�Ý �×ßná�¤8âÇFXí.´�k�hBMIËP�Y>?IpJh´�EIH¥E¶[�d��³vÌ�Î�³P@Í@h>A¶=?�YÎ=ÊBMI;�¡JC@+JC´H@�ËP�ͳnÑ8@�Ñ8>AJC´p>?I°¡�h��Bv@h>?I;˶>AI�BM�ÍϾÎ[�d�Í>ÊBM@�JC�h³MI ��@h>A¥Ã>A=ÊBM�Í=AÏMÙ;JC´�EBnØM�d�hBMËP�kIH¥E¶[�d��³vÌ�Î=ÊBMI;�¡JC@9ÌÖ³P�h¥��d p>?IpJh´�E@h>A¥EH=?BvJC>A³PI@8>?@^BMI>?I;°d�h�dBM@h>AIËÐÌÖHI°¡Jh>?³PI¾³MÌ�Ü�Ý/F �*I¾JC´�ÇÜ�Ý � $:F èk¤8â @Í�¡J9Ñ8>AJh´½� � HBM=¿¥ÃBM@Í@9@�JLBM�Í@+³vÌ�ß D H�Ù�@h´³nÑ8I£>AI¶=AH�MÙBMI�B�ØP�¡�CBMËM�.³MÌÅå:FK1�Î=?BMI�UJC@ÕÌÖ³P�Í¥Ã�¡ k>?IEJC´;�. >?@�JC�h>A¶H;Jh>?³PIE³vÌ�³MH�/=ÊBM�ÍËP�d@�J/@h�UJ�³MÌ Pá�>?IKJC�¡ËP�CBfJC>?³MI@dFí.´�Y >?@�JC�h>A¶H;Jh>?³PI«�UÔ:Jh�dI @+Ì�BM�ÍJh´�d�9³PH;J+>AÌ�JC´�YÎ��¡�ÍJhH�h¶>AIË�@ÍJLBv�+>A@+@Í¥�BM=A=?�¡�.�h�d=?BvJC>�ØP�$JC³�JC´�Ç°d�¡IKJC�CBv=@ÍJCBM�.ÌÖ³P�9B�ËM>AØP�¡I½@�JC�¡=?=ÊBv�.¥�BM@Í@8�CBvJh>?³Ù�BvI ½@Í=?>AËP´KJC=AÏÃÌ�BM�ÍJh´�d�8³PHxJ9Ñ8´;�dI½Jh´�(@ÍJCBM�h@+BM�h�(¥�³P�h�(¥ÃBM@h@Í>AØM��h�¡=ÊBvJh>AØM��JC³kJC´�( >A@h±�F

��>AËPH�h�(ßPß9@h´;³�Ñ8@�JC´�9 >?@�JC�Í>?¶H;Jh>?³PIгMÌ "�I�BM=�Î=?BMI�¡JCBM�ÍÏÐ¥ÃBM@Í@h�d@#��>AI�HI;>AJC@�³MÌXJC´�+<�BM�ÍJh´ � @�¥�Bv@h@dÙD����ÌÖ³P�Í¥Ã�¡ �>AI�@�Ïx@�JC�¡¥Ã@ÇÑ8>AJC´~Ü�Ý � 諤8â �ÖJh³PÎ�ÎBMI�d= �UÙ6$xF 諤8âÇÙ �Ö¥Ã>A  =A�kÎ�BMI�¡= �UÙ¿BMI 1ßn᫤8â��=A³nѵ�¡�EÎ�BMI�¡= �¦FÒí.´�ª¥Ã�¡ >ÊBvI ¥�Bv@h@E³MÌ8Jh´�P"�I�Bv=µÎ=?BMI�¡Jh@E ³:�d@ÍI � JР;�dÎ[�dI  ËP�Í��BvJh=AÏ~³PI Ü�Ý/F¹í.´>A@�h�¡@hH=�J$@hH;ËPËP�d@�JC@�Jh´�BvJ�Î;=ÊBMI�UJ^ÌÖ³P�Í¥�BfJC>?³MI½�Í�d¥ÃBM>?I@ � H>AJh�E�¡Ú�°d>A�dIKJ$>AIpJC´�·@ÍJLBv¶=?�Y�h�dËM>?³PI@¡ÙX¶HxJ�JC´�BfJJC´;��@h>Y4d�-³vÌ�JC´��@ÍJLBv¶=?�Ã�h�dËM>?³PI�@h´�Í>?I±@kBM@YÜ�Ý ËP�UJC@·@Í¥�Bv=?=?�¡�dF«í.´>A@·JC�Í�dI  >A@·°¡³PI@h>A@ÍJh�dIKJEÑ8>AJh´»JC´;� �¡°d=?>AI�ª>?I JC´;�¾IH¥·¶��¡��³vÌ�Î=?BMI�¡Jh@Ð@h�d�¡I�>AI �¿>?ËPH�Í�Òßná;F É ´�¡I JC´;�¾Î[�d�Í>ÊBM@�JC�ͳPI ØMBv=?H�ª¶[�d°¡³P¥Ã�¡@BM@E@Í¥�Bv=?=�BM@Ð轤8âÇÙÕÎ=?BMI�¡Jh@·³PI;=AϹÌÖ³P�h¥!Ñ8>AJh´>?I ߪ¤8âYÙ�BMI  JC´;�-¥�Bv@h@· ;>?@ÍJh�h>A¶H;JC>A³PI�Jh>?=�JC@(JC³nÑ�Bv�h ��� D�ÕÙX>aF �vFAÙ[JC´�EÌÖ³P�Í¥�BfJC>?³MI½³MÌ�<�BM��JC´ � =?>A±M�·Î;=ÊBMI�UJC@�>A@^°¡³P¥ÃÎ;�h³P¥�>?@Í�d �F$�¿>?ËPH�Í�Ãßnå� >?@ÍÎ=ÊB�Ï:@^JC´;�

 >A@ÍJC�Í>?¶HxJC>?³MIk³MÌX�¡°d°¡�dIKJC�Í>?°d>�JC>A�d@ÕÌÖ³P�ÕJh´�8Î=ÊBMI;�¡JC@/Jh´�BvJ�BM�Í�9¥�³P�Í�.¥�BM@Í@h>�ØP��JC´BMI�Jh´�8Î=ÊBvI�¡J QpBv�h@/JC´�BfJ�h�¡¥�Bv>?I >?I @�Ï:@ÍJC�¡¥Ã@kÑ8>�JC´ Ü�Ý � 裤8â �ÖJh³PÎ Î�BMI�¡= �UÙ�ÜdÝ � $:F èp¤8â?��¥�>? ; =?�ÃÎ�BMI�¡= �UÙ�BMI; 1ÜdÝ �ßnᾤ8â ��¶[³MJhJh³P¥6Î�BMI;�d= �¦F½í.´;�- >?@�JC�Í>?¶H;Jh>?³PI¹³MÌ8�¡°d°¡�dIKJC�Í>?°d>�JC>A�d@·�Í��BM°L´;�d@E�Í�d=ÊBfJC>AØM�d=�Ϲ´>?ËP´~ØvBM=?H�¡@·>AI@h�UØP�¡�CBM=Õ@Í>?¥EH;=ÊBvJh>?³PI@2�ÖHΣJC³«ä�á;F ëèÃ>?I½JC´�Y@ÍÏ:@ÍJh�d¥ Ñ8>�JC´pJh´�E=ÊBv�hËP�¡@ÍJ�Î[�d�Í>ÊBM@�JC�ͳPI��UF#7+³nÑ��¡ØP�¡�dÙÅJC´;�¥ÃB�ÓͳP�h>�J*Ï�³vÌ�Î=?BMI�UJC@8³P�h¶;>AJ.³PI¾I�dBM�h=�Ï-°d>A�h°¡H=ÊBM� � �^ç áxFAß��µ³M�h¶>�JC@dF

� È �������@�� C�@����

í.´>A@µÎ�BMÎ[�d��@ÍJhH >A�d@�Jh´�^=?BvJC�8@�JLBMËP�¡@µ³MÌXJC�d�Í�h�¡@ÍJC�Í>ÊBM=�Î=?BMI�UJ�ÌÖ³P�Í¥�BfJC>?³MI�>AIö;>?I�BM��ÏÐ@ÍJCBM��@�Ï:@ÍJC�¡¥Ã@¡Fí.´�¡@h�E ;Ï:I�Bv¥Ã>A°�BM=�@ÍÏ:@�JC�d¥�@9쪠>?@ͱ:@+³MÌ/Î=?BMI�UJC�d@Í>?¥ÃBM=?@.³M�h¶>�JC>?I;ËÃ>AI¾Jh´�·Î[³MJC�¡IKJC>ÊBv=�³vÌ�Bö>AI�BM��Ï«@ÍJLBv�ì¾Bv�h�Ç°L´�BM³MJh>?°YBMI £ >A@hÎ=?B�Ï«�UÔ:JC�Í�d¥��d=AÏ«@Í�dI@Í>AJh>AØP�Y �dÎ[�dI; �dI°¡�k³PI½Jh´�d>A�+>AI>AJh>ÊBM=�°d³PI; >AJh>?³PI@¡F �*IpJC´;�Î�Í�d@h�¡IKJ+°¡³PIKJC�¦ÔxJdÙ�BM@�ÌÖ³P�.BvI�BM=?³MËP³PH@�¥Ã³: �d=A@µ³MÌ�Jh�d�h�Í�d@�JC�h>?BM=�Î=?BMI�UJ�ÌÖ³P�h¥ÃBvJh>?³PI�BM�h³PH;I «BE@h>AIËP=?�^@ÍJLBv��V¢µ´BM¥E¶[�d�h@ SU_/QMe)( åváPáKåxÙxG�H>?IKJCBMI�B�� ²�>A@h@hBMH�d�µåMáPá�+.�UÙK>�Ì�³PI�+³MÌXJh´�9Î=ÊBMI;�¡JC�¡@h>A¥�BM=A@/>?@�¥Ã³nØM�d �³MI=AÏ

Page 16: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìpß�+Yì

³PI�Ç¥��¡JC�¡�9ÌÖ³M�ÍѵBM�h ½BM=?³MIËÃ>�JC@8>?I;>AJC>?BM=X³M�h¶>�J�ÙJC´;�Y >�ÛX�¡�h�¡I°d�Y>?I«JC´� "�I�BM=�IH¥E¶[�d�¡Ù�¥�BM@Í@h�¡@dÙ�BMI �&v³M�³P�Ͷ>AJh@¿³MÌ�Jh�d�Í�h�d@�JC�Í>ÊBM=Î=?BMI�¡Jh@¿Jh´�BvJ�ÌÖ³M�h¥ °�BMI·¶���@hH¶@�JLBMIKJh>ÊBM= ��@Í�d�.��>AËPH�Í�+ß��¦FÕ<ÕÛ��d°¡Jh>AØM�d=AÏÇ� � H;>AØvBM=?�¡IKJ@ÍJCBM�ÍJh>?I˾@ÍJCBvJC�¡@·JC´H@Y=?�dBM �Jh³p >�ÛX�¡�h�dIKJ "�I�BM=�@ÍJCBvJC�¡@dF«¤^@·B½�Í�d@hH;=AJ�Ù�JC´�ÃIH¥Ã�¡�h>A°�BM=�@h>A¥EH=?BvJC>A³PIÒ³MÌBM°¡°d�h�UJC>A³PI£ÌÖ�h³P¥ BMIKϽÎ�BM�ÍJh>?°¡H=ÊBM�+>?I>�JC>?BM=Å°d³PI "�ËPH�hBvJC>A³PI£°�BvII³MJ$¶[�k �¡@h°d�Í>?¶[�d Ò>AI£JC�d�Í¥Ã@^³MÌ�B-@h>AIËP=?�³PH;Jh°d³P¥��MÙ+¶H;J¾�CBfJC´�¡�ª¥EH@ÍJ¾¶[�¹°d³PI@Í>? �¡�h�¡ 7BM@¾B  >A@ÍJC�Í>?¶HxJC>?³MI ³MÌ·³MH;JC°¡³P¥Ã�¡@dFéí�³ Bv°d°d³MHIKJ¾ÌÖ³M�JC´;>?@-°¡³P¥ÃÎ;=?>?°dBvJC>A³PI�ÙµÑ��¹Î��¡�ÍÌÖ³P�Í¥Ã�¡  ¥EH=�JC>?Î;=?�¾�h��Bv=?>X4dBvJC>A³PI@ÐÑ8>AJh´ �¡Û��d°¡Jh>AØM�d=AÏã� � H>AØvBM=A�dIKJª@�JLBM��JC>?I;Ë°d³MI >AJh>?³PI;@ÐÌÖ³M�ÃBv=?=�³MÌ+JC´�¾¶>AI�BM�ÍÏ @ÍÏ:@ÍJh�d¥�@�°d³MI@h>A �d�Í�d ã´�¡�h�¡>?I�F���³M�ÍJCH;I�BvJC�¡=AÏMÙµ�¡ØM�dI�Jh´³PHËM´ JC´;�@ÍÏ:@�JC�d¥�@ÃBM�h�ª°L´�Bv³MJC>A°«BMI 1 ³¹I³MJ�´�B�ØP�¾B¹@h>?I;ËP=?�-³MH;JC°¡³P¥Ã�vÙ�Jh´�ª >A@ÍJC�Í>?¶HxJC>?³MI@E³MÌ+³PH;Jh°d³P¥��d@�BM�Í�Ñ��d=?= �  �s"�I�¡ �Fª��H�ÍJh´�d�¡Ù�Jh´�d@Í�� >A@ÍJh�h>?¶;H;JC>A³PI@$@h´;³�Ñé°¡=?�dBM�$JC�h�¡I @ÇÑ8>AJC´¹ØvBM�ÍÏ:>AI˽Î;�h³PÎ[�d��JC>?�¡@(³MÌ�JC´;�¶>AI�BM�ÍÏ�@�JLBM��@�Ï:@ÍJC�¡¥Ã@8BvI ª°�BMIª¶[��H@Í�d -Jh³k@ÍJCH; ;Ï�Jh´���¡Û��d°UJC@.³MÌ�¶;>?I�BM�Í>?�¡@µ³PI�Jh´��Î=?BMI�UJµÌÖ³P�Í¥�BvJh>?³PIÎ�ͳx°¡�d@h@¡F

A�H�9�UÔxÎ=?³M�CBvJh>?³PI«³MÌ�Î�BM�CBv¥Ã�UJC�d�8@ÍÎ�BM°d�Y@h´³nÑ8@+´³nÑ ¶>?IBM�ÍÏ«³P�Ͷ>AJCBM=�Î�Bv�CBM¥��¡Jh�d�h@+BvÛ��d°UJ9Jh�d�Í�h�d@ �JC�Í>ÊBM=�Î=?BMI�¡JYÌÖ³P�h¥ÃBvJh>?³PI�F¾É»�3"�I  JC´�BfJ·JC´;�ªÎ�h�¡@h�dI;°d�«³MÌ9B£¶>AI�BM�ÍÏ~°¡³P¥ÃÎBMI>?³MI ³MÌ8³P�Í �d�-ß�áp¤8âB�Ñ�B�Ï Bv°¡JC@EJh³¹=?>?¥�>AJ(Jh´�ªIH¥E¶[�d�k³MÌ8JC�¡�h�Í�d@ÍJh�h>?BM=�Î=?BMI�¡Jh@·ÌÖ³P�Í¥Ã�¡  BMI  JC´�ª@ÍÎ�BvJh>ÊBM=��UÔ:JC�¡IJ�³MÌ9JC´;�JC�¡�h�Í�d@ÍJh�h>?BM=�Î=?BMI�¡J��h�dËM>?³PI�Ù;BM@8@h´³nÑ8I¾¶KÏ«��>?ËMH�h�¡@ Yì½ß�åxF/í�³�=A��BM ;>?IËk³P�Í �d�¡Ù;JC´;�$Î��¡�h>ÊBv@ÍJC�ͳPIªØvBM=?H�Ü�Ý >?@YJC´�ª¥�³P@ÍJE>?¥�Î�³P��JLBMIKJYÎ�BM�hBM¥Ã�UJC�¡�E>?I  �UJC�¡�h¥�>?I>AIË£¶>AI�BM�ÍÏ��¡Û��d°UJC@k³PI Î=?BMI�UJLBM��Ï»³PHxJC°d³M¥Ã�¡@��¥�³P�Í��Î�h�¡ >?°UJC>�ØP�^Jh´�BMI �Ý�³P� �nÝ�BM=A³PI�C�UF��*Iª³PH;�.�dI@Í�d¥E¶=A��³MÌ�ßná,1·Ñ8>A ��¶>AI�BM��Ï�@Í>?¥EH=?BvJC>A³PI@�JC´�BfJ¶[�dËKBMI£Ñ8>�JC´Ò� � HBM=Õ¥ÃBM@h@�@�JLBM�Í@dÙ�ÌÖ�ͳP¥ ßYì +-Î;=ÊBMI�UJC@^ÌÖ³M�h¥��d £Ñ8>AJh´Ò@h�¡¥Ã>A¥�B�ÓͳM�^BfÔx�¡@Çç×åxF å�¤8ây³MÌJC´;�k°d�dIKJh�CBM=Õ@�JLBM�^>?I£¶>AI�BM��Ïp@�Ïx@�JC�¡¥Ã@$Ñ8>AJh´ÒÜ�Ý � ß�á�¤8âYÙXÌÖ�ͳP¥ ßYì£è�Î=ÊBMI;�¡JC@+ÌÖ³P�h¥��d pÑ8>�JC´>AI ßPFK$¤8âæÌÖ³P�^@ÍÏ:@ÍJh�d¥�@�Ñ8>AJC´pÜ�Ý � $xF èä8âÇÙÅBMI pÌÖ�ͳP¥ ßYìT -Î=ÊBvI�¡Jh@+ÌÖ³P�Í¥Ã�¡ £Ñ8>AJC´;>?I£áxF -¤8âæÑ8´;�dI¹Ü�Ý� è·¤8âYF �9³PI�UJC´�¡=?�d@Í@dÙÌÖ³P�µBEËP>AØM�dIª¶>AI�BM��Ï�Î[�d�Í>?@CBfJC�h³MI-Ü�Ý/Ù;ÌÖ�Uѵ�¡�.Î=ÊBMI;�¡JC@�JC�dI; «Jh³·ÌÖ³P�Í¥�>AI-¶>?IBM�ÍÏ@ÍÏ:@�JC�d¥�@8Ñ8>AJC´«=?BM�hËP�¡��ØvBM=?H�¡@.³MÌ!� �Ý/Ù �nÝO� �Ö@h�¡�·��>AËPH�Í��ë �UF

-µ>AI�BM�ÍÏ�°¡³P¥ÃÎBMI>?³MI@�BM=A@h³Y=?>?¥�>AJ/Jh´���¦ÔxJh�dIKJ8³MÌÅJh´�^JC�¡�h�Í�d@ÍJh�h>?BM=�Î;=ÊBMI�UJ��Í�dËP>A³PI�>AI-I�BM@Í°d�dIKJ8@ͳP=ÊBM�@ÍÏ:@�JC�d¥�@dFæ¤^@ª@Í´³nÑ8I">AI ��>AËPH�h�¡@ ;Ù+èxÙ+BMI  $¹ì ;Ù.Ñ8>A �d�ª¶>AI�BM�Í>?�d@�BM=?=A³nÑ×ÌÖ³P�-@ÍÎ�BvJC>?BM=?=�Ï =ÊBM�ÍËP�d�@ÍÏ:@�JC�d¥�@9³MÌ�JC�d�Í�h�¡@ÍJC�Í>ÊBM=XÎ=ÊBMI;�¡JC@¡F A$I;°d�ÇBMËKBM>AI�Ù;¶;>?I�BM��Ï-Î[�d�Í>ÊBM@�JC�h³MIª>?@�JC´;�Ç¥�³P@�J.>?¥�Î�³M�ÍJLBvIJµØMBv�h>ÊBv¶=?�>?I  ;�¡JC�¡�h¥�>?I>AIË»Jh´�Ò�UÔ:JC�¡IKJ½³vÌYJh´�["�I�BM=^@ÍÏ:@ÍJh�d¥ ³MÌÇJC�¡�h�Í�d@ÍJh�h>?BM=^Î=?BMI�UJC@ �aBv@ª¥Ã�dBM@hH�Í�d  ¶KÏãJC´;�@h�¡¥Ã>A¥�BnÓͳP�$BfÔx>?@$³vÌ�Jh´�k³PH;Jh�d�h¥�³P@�J(Î=ÊBMI;�¡Jn�¦F>7+³nÑ��¡ØP�¡�dÙ�ÌÖ³P�(BªËP>AØM�dI~Î��¡�h>?BM@ÍJh�h³PI�Ù�Jh´�Ð@h>Y4d�d@(³MÌ�JC´;�JC�¡�h�Í�d@ÍJh�h>?BM=�Î=ÊBMI;�¡J+@ÍÏ:@ÍJh�d¥�@^@h´;³�ÑæBÐÑ8>? �Ç >?@�JC�Í>?¶H;Jh>?³PIXF �*IpJh´�d@Í�E@h>A¥EH=ÊBfJC>?³MI@dÙ;Jh´�·>AI>AJh>ÊBM=� >?@ͱª³MÌÎ=?BMI�¡Jh�d@Í>?¥ÃBM=?@Ç�UÔ:JC�¡I @k³PHxJ·JC³~徤8âYÙ�@ͳ£Ñµ�� ³ÒI³MJ·�UÔxÎ��¡°¡JkJh�d�h�Í�d@�JC�h>?BM=�Î=ÊBMI;�¡JC@YJC³pÌÖ³P�Í¥!¥EH°L´¶[�¡ÏP³MI -JC´>A@µ�hBM >?H;@dF���³P��¶>?I�Bv�ÍÏ�Î��¡�h>?BM@ÍJh�h³PI-ÜdÝ � ß�á·¤8âYÙ:JC´��@Í�d¥�>?¥ÃB�ÓͳP��BfÔx>?@�³MÌÅJC´�+³PH;Jh�d�h¥�³P@�JÎ=?BMI�¡J�J*Ï:Î>A°�BM=A=AÏE=A>?�¡@�I;��BM��åǤ8âÇÙ>VF �MF�ÙJh´�9@ÍÏ:@ÍJh�d¥é�UÔxÎ=A³P�h�¡@�Jh´�+�¡IKJC>?�Í�^B�ØvBM>A=ÊBM¶=A��Î�BM�hBM¥��¡JC�¡��@hÎ�BM°¡�ÌÖ³P�kÎ=?BMI�UJ�ÌÖ³M�h¥ÃBvJC>A³PI�F % >AI°d�ªJh´�d@Í�p�h�¡@hH=�JC@kÑ��d�h�¾³P¶;JCBM>?I;�d  Ñ8>AJC´1� � H�Bv=.¥�BM@Í@Ð@ÍJLBv�h@ ��>?I;°d=?H; >?IËJC´;³P@h�¾Ñ8>AJC´ D � ßPF áFDIH �UÙ�Ñ��p°d³MI°d=AH �½Jh´�BvJ�JC´�½°d³PI;@ÍJC�hBM>?IKJÃÜ�Ý � ß�á~¤8â >?@�@hH;Ú�°d>A�dIKJ�ÌÖ³M�¶>AI�BM�h>A�d@kJC³�=?�dBnØM�½Jh�d�h�Í�d@�JC�h>?BM=.Î=?BMI�¡JÃ@ÍÏ:@�JC�d¥�@�H;IÎ��¡�ÍJhH�h¶[�d �F É >�JC´�@Í¥�Bv=?=?�¡�k¶>?IBM�ÍÏ Î[�d�Í>ÊBM@�JC�h³MIØvBM=?H;�d@dÙ9JC´�Ò�Í�d@ÍH=AJh>?IË �¦ÔxJh�dIKJ½³MÌ(JC´�ÒJC�¡�h�Í�d@ÍJh�h>?BM=�Î=?BMI�¡J-�h�dËM>?³PI >?@� >?¥�>?I>A@h´�¡ �F É ´�dI"¶>?IBM�ÍÏÎ[�d�h>?BM@ÍJh�h³PI½ �d°¡�h�dBM@h�¡@^JC³-è�¤8âYÙ�JC´;�YJ*Ï:Î>?°dBM=�@ÍÏ:@ÍJh�d¥ �UÔ:JC�¡I @�³PI;=AÏ«³PH;J9JC³ �

�äéá;FK$Pè�¤8âæBMI ½I³

@ÍÏ:@�JC�d¥ ´BM@8BkÎ=ÊBMI;�¡J�Ñ8>�JC´«@h�¡¥Ã>A¥�B�ÓͳM��BfÔx>?@.¶[�¡ÏM³PI ½á;F�E¤8â �Ö¶H;J8I³vJC��JC´BvJ.ѵ�( >A ªI³MJ8Î[�d��ÌÖ³P�h¥

Page 17: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìpß�$Çì

@h>A¥EH=?BvJC>A³PI@�Ñ8>�JC´«Ü�Ý �yèk¤8â BvI «@h¥ÃBM=?= �nÝ��¦FÉ ´>A=?�EJC´;��IH¥·¶��¡�dzvÌ�ÌÖ³P�Í¥Ã>AI˪Î=?BMI�¡Jh@(BMI ¹JC´�¡>?�$�hBMIËP�гMÌ�³P�h¶;>AJC@$>A@$�h�¡@ÍJC�Í>?°UJC�d �¶KÏÒ¶>?IBM�ÍÏ

°d³M¥ÃÎ�BvI>?³PI;@dÙµJh´�p¥ÃBM@h@Í�d@�BMI ã�¡°d°d�¡IKJC�h>A°d>�JC>?�¡@óvÌ�JC´³M@h�£Î=?BMI�UJC@ÃBM�h�½¥EH°L´ã=A�d@h@�BvÛ��d°¡Jh�d �F -µ³MJh´��>AËPH�h�¡@;$�BMI; »ß�åE@hH;ËPËP�d@�J^Jh´�BvJ9Î=ÊBvI�¡J9�d°¡°d�¡IJh�h>A°d>AJh>?�¡@8Jh�dI ½JC³ÃBM�h>A@h�$ÌÖ�h³P¥�JC´�Ç@CBM¥��( >?@�JC�Í>?¶H;Jh>?³PI�ÖÑ8>�JC´~B«¶�h³KBv �Î[��BM±pI��BM����� ��á

�á�1¾BvI »BªJLBv>?=¿Jh³nÑ�BM�Í »´>AËP´�¡��ØMBv=?H�¡@w�^ÌÖ³P�(BM=A=Õ³MÌ�JC´�Ð@ÍÏ:@�JC�d¥�@

°d³MI@h>A �d�Í�d £>AI½JC´;>?@9@ÍJCH; ;ÏPF9í.´�· ;>?@ÍJh�h>A¶H;JC>A³PI«³MÌ/Î=?BMI�UJ^¥ÃBM@h@Í�d@+>?@9I��BM�Í=AÏ«>AI �dÎ[�dI; �dIKJ�³vÌ/¶>?IBM�ÍÏÎ[�d�h>?BM@ÍJh�h³PI[��@Í�d�$��>AËPH�Í�YßPß��UÙxBM=AJh´³PHËP´�JC´�9Ñ8>? �¡�µ¶>AI�BM�Í>?�d@�BM=A=?³nÑãÌÖ³P��BYÌÖ�¡Ñ @Í=?>AËP´KJC=AÏÐ¥�³P�Í�+¥ÃBM@h@Í>AØM�JC�¡�h�Í�d@ÍJh�h>?BM=+Î;=ÊBMI�UJC@�JC³»ÌÖ³P�Í¥½F ��>AI�BM=?=�ÏPÙ�ѵ�ÒI;³MJC�¾JC´�BvJÃJC´�½JC>?¥��«@h°dBM=?�¡@-�h� � H;>?�h�¡ ãÌÖ³P�ÐJC�d�Í�h�¡@ÍJC�Í>ÊBM=Î=?BMI�¡J(ÌÖ³P�Í¥�BfJC>?³MIÒ>?I¹JC´�¡@h��@�Ï:@ÍJC�¡¥Ã@Y=?>A�k>?I¹JC´���CBMI;ËP�ÃèMáªì¹åMáPáTQ¾Ï:�dÙ¿°d³PI@Í>?@�JC�dIKJÇÑ8>AJh´�Î�Í�¡Ø:>?³MH@"�I ;>?IËP@#���vF Ë;FAÙ;¢µ´�BM¥E¶[�d�Í@�åváPá;ßPÙxG�H>?IKJCBMI�B SU_/QMe)( åMáMáKåxÙ:G�H>?IKJCBMI�B�� ²�>A@h@hBMH�d�µåMáPá�+.�UÙ:BMI �=ÊBv�hËP�¡=AÏ>?I; �dÎ[�dI ;�dIKJгMÌ8JC´�ª¶;>?I�BM��Ï~Î�h³PÎ[�d��JC>A�d@dF¹í.´>A@k�h�¡@hH=�Jk>?@YI³MJkHI;�UÔxÎ��¡°¡Jh�d �ÙµBM@·JC´;�ª°d=?³:°L±¹ÌÖ³P�·JC´;�BM°¡°dH¥EH;=ÊBvJh>?³PIk³MÌ�Î=?BMI�¡Jh�d@Í>?¥ÃBM=?@Õ>A@/@h�UJ�¶KÏkJh´�d>A�/³P�h¶>�JÕJC>A¥Ã�8BvI Ð¥�BM@Í@h�¡@\� % BvÌÖ�CBvI³nØªß ,+�,�UÙKBMI; ÃI³vJ¶KÏ-JC´;�Ƕ;>?I�BM��Ϫ³P�Ͷ>AJCBM=XÎ[�d�Í>?³: �F

É ´>�JC¥�>?�h���UJ/BM=aF ��ß �,1,��´�B�ØM�.BMI�BM=�Ï 4d�d YJC´���¡Û��d°¡Jh@Õ³MÌ�Î[�d��JCH�Ͷ�BvJh>?³PI@�¶KÏEB9¶>?IBM�ÍÏ(°¡³P¥ÃÎBMI>?³MI³PI½Î=ÊBMI;�¡JC�¡@h>A¥�BM=A@8 H�h>AIËÃJh´�·�dBM�h=A>?�¡�.@ÍJLBvËP�d@�³vÌ/Î=ÊBvI�¡JCBM�ÍÏ«ËP�ͳnÑ.JC´�F8¤^@Í@hH¥�>?I;ËÃJC´BvJ^°¡³P=?=A>?@Í>?³PI@8BfJØP�¡=?³:°d>�JC>?�¡@^Þ ßnáPáY¥9&v@� >?@Í�hHÎxJ.Î=ÊBvI�¡Jh�d@h>A¥�Bv=?@dÙKJh´�¡Ï3"�I -JC´BvJ.>AÌXJ*ѵ³«ß Q H£@�JLBM�Í@.´�B�ØP�$Î[�d�Í>ÊBM@�JC�h³MIÜ�Ý � ß�++¤8âYÙMJh´�dIÐÎ=?BMI�¡JCBM�ÍÏYËP�ͳ�Ñ.Jh´�BvJ�ß.¤8âã>A@Õ>?I´;>?¶>�JC�d XF¿í.´>A@Õ°d�Í>AJh�d�h>A³PIE>A@եóM�h�µ=A>?¥�>AJh>?IË.JC´BMIJC´;�.�h�d@ÍH=AJh@/³MÌ�JC´>A@ÕÎ�BMÎ[�d��@hHËPËM�d@ÍJdF0-µH;J/I;³MJC��Jh´�BvJÕÉ ´>�JC¥�>?�Í�µ�¡J/BM=VF � @�¥Ã³: �d=x ³:�d@/I³MJÕ>?I°¡=?H �µËKBM@dF�¿�¡�ÍJhH�h¶�BfJC>?³MI@Y¶KÏ~B«ËKBM@Í�d³PH@Ç >A@h±Ò°�BvI BM=A>?ËPIÒÎ=?BMI�UJC�d@Í>?¥ÃBM=Õ³P�Ͷ>AJh@dÙ��h�¡ H°¡>?I˽°d³P=A=?>?@Í>?³PI½ØP�d=A³x°¡>AJh>?�d@BMI kJh´�d�Í�d¶KÏ�BM=?=A³nÑ8>?IË+ËP�h³nÑ.JC´kJh³ÇÎ;�h³:°d�d�¡ �BMI ÐÎ�h³: H°¡�8¶�³: >?�¡@Õ³MÌ�JC´;�9@Í>X4¡�d@ÕJC´BvJ/ѵ�8H@Í�9BM@/>?I>�JC>?BM=°d³MI >AJh>?³PI;@.³�ØM�d�9BÐ=ÊBM�ÍËP�d���hBMIËP�$³vÌÕ@h�¡¥Ã>A¥�BnÓͳP��BfÔx>A@ �@N$³P�ÍJh�dI±fBM¥�Î � É��¡JC´;�d�h>A=?=�åváPáPá.�¦F

A�H�$ѵ³M�h±Ò´�BM@(>A¥ÃÎ[³P�ÍJCBMIKJ(>?¥�Î=?>A°�BvJh>?³PI;@+�Í�dËKBM�Í >?I;Ë«Jh´� � H;�d@ÍJh>?³PI~³MÌ�Ñ8´�BvJ(ÌÖ�CBM°UJC>A³PI¹³M̵@�JLBM�Í@¥�>?ËP´KJ�´BM�h¶[³P�^Jh�d�h�Í�d@�JC�h>?BM=�Î;=ÊBMI�UJLBM��Ïp@�Ï:@ÍJC�¡¥Ã@¡FEí.´�k¥ÃB�ÓͳP�Í>AJ*Ͼ³MÌ�@h³P=?BM� � J*Ï:Î��E@�JLBM�Í@$=?>�ØP�E>AI£¶>?IBM�ÍÏ@ÍÏ:@�JC�d¥�@dÙ�BMI ~¶>?IBM�ÍÏÒ°¡³P¥�Î�BMI>A³PI@$°�BvI� >A@h�ÍHÎ;JǶ�³vJC´¹JC´�ÐÌÖ³P�h¥ÃBvJh>?³PI£³v̵JC�¡�h�Í�d@ÍJh�h>?BM=/Î=ÊBvI�¡Jh@YBvI JC´;�d>?�µ=?³PIËYJC�d�Í¥ Î�ͳP@hÎ[�d°UJC@.ÌÖ³P��@�JLBM¶;>?=?>�J*ÏPF¿¤^ÎÎ�ͳ�Ô;>A¥�BfJC�d=�Ï�´BM=AÌ�³MÌ�Jh´�$±I³nÑ8I½¶>AI�BM��Ï�@�Ïx@�JC�¡¥Ã@9BM�Í�Ñ8>? ;���¡I³PHËM´ �Ö>?IÒJC´>A@$°d³PIKJh�UÔ:J�Ù�´�B�Ø:>?I˾@hH;Ú�°¡>?�dIKJh=AÏÒ=?BM�hËP�YØMBv=?H�¡@dzv̵Î[�d�Í>ÊBM@�JC�h³MI��^@h³«JC´�BfJÇ<�Bv�ÍJC´ �=?>A±M�-Î;=ÊBMI�UJC@E°dBMI �h�¡¥�BM>AI @ÍJCBM¶=?��³�ØM�d�kJC´;�ª�dIKJC>A�h�-ëFG+~ê$Ï:�kBvËP�ª³MÌ9³PH� % ³P=ÊBM� % Ï:@ÍJC�¡¥ �:$B�Ø:>?  SU_QMe)( åMáPá� ;Ù/��BvJCH'4�4d³ SU_ÇQMe)( åváPá,+.�¦F¹��³M�YJC´;�-@ÍÏ:@ÍJh�d¥ Jh³£¶[�-@ÍJCBM¶=?��³PH;JEJh³pJC´�� >?@�JLBMI°¡�-³MÌ#QpBM�Í@ � @³P�Ͷ>AJdÙ�Jh´�ª¶>AI�BM�ÍÏ»Î��¡�h>?BM@ÍJh�h³PI ÜdÝ ¥EH@�J�¶��ªËP�Í��BvJh�d�EJh´�BMI BM¶�³MH;JU$£¤8âYÙ�BMI;  Bv¶�³PHxJд�BM=AÌ9³MÌ9JC´;�³P¶@Í�d��ØP�d ~¶>AI�BM�h>A�d@+´�B�ØP�kÜ�Ý Þ $ä8âYFOA�H�+ѵ³P�ͱp³PI½JC´�EÌÖ³P�Í¥�BfJC>?³MI½³MÌ�Jh�d�h�Í�d@�JC�h>?BM=�Î=ÊBMI;�¡JC@^@h´³nÑ8@@h>A¥Ã>A=ÊBM�8JC�Í�dI ;@dFÐÉ ´�dI~JC´�ÐÎ[�d�h>?BM@ÍJh�h³PI¹³MÌ�JC´;�ö>AI�BM��Ï£>?@$=?BM�hËM�d��JC´BMI~BM¶�³MH;JÇÜ�Ý � ßn᪤8âYÙÅ�¡ØM�dIÌÖ³P��JC´�^°�BM@Í��³MÌÅ� � HBM=X¥ÃBM@h@�@ÍJCBM�h@¡ÙxJC�¡�h�Í�d@ÍJh�h>?BM=�Î=ÊBMI;�¡JC@�°�BMIÃÌÖ³P�h¥é³nØP�¡���d@Í@h�dIKJh>ÊBM=A=AÏÐJC´�+�dIKJC>A�h�+�CBMIËM�³MÌ�³P�h¶>�JC@9BM=A=?³nѵ�¡ ªÌÖ³P�8@h>?I;ËP=?�$@�JLBM�Í@_�Ö³PH;J8JC³ÐJC´�Ç�d ;ËP�Y³vÌ�JC´;�Y>AI>AJh>ÊBM=[Î=ÊBvI�¡Jh�d@h@Í>?¥ÃBM=Å >A@h±ªBvJ^åk¤8â\�¦FÉ ´�¡I�Î[�d�h>?BM@ÍJh�h³PIÐÜdÝ �àßná$¤8âÇÙK´³nѵ�UØP�d�¡Ù;JC´;�9 ;>?@ÍJh�h>A¶H;JC>A³PI@Õ³vÌXÎ=?BMI�UJLBM��Ïk³P�h¶;>AJLBv=;Î�BM�hBM¥��¡JC�¡�h@�BM�Í�@ÍJh�h³PI;ËP=AÏ�BvÛ��d°¡Jh�d «¶KÏ�Jh´�$Î�h�¡@h�¡I°d�dzMÌ�JC´�^¶>?I�Bv�ÍÏðd³P¥�Î�BMI>A³PI��Ö@h�d�Ç��>AËPH�Í�d@ $Çì½ß�å��UF % Î[�d°¡>Y"�°dBM=?=�ÏPÙJC´;�$I:H;¥E¶��¡�8³MÌ�JC�d�Í�h�¡@ÍJC�Í>ÊBM=XÎ=ÊBMI;�¡JC@8BvI ªJC´�$@ÍÎ�BvJC>?BM=X�¦Ô:JC�dIKJ9³MÌ�JC´��Jh�d�Í�h�d@�JC�Í>ÊBM=�Î;=ÊBMI�UJ.�h�¡ËP>?³MIª¶�³MJh´

Page 18: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìpß�1Yì

 �¡°d�h�dBM@h�ªÑ8>�JC´  �¡°d�h�dBM@h>AI˹¶>?IBM�ÍÏ�Î��¡�h>?BM@ÍJh�h³PI�FÒÉ ´�¡I JC´�ªÎ[�d�Í>ÊBM@�JC�h³MI»ØvBM=?H��¶��¡°d³P¥��d@ÐBM@·@h¥ÃBM=?=BM@¾è ¤8âYÙµÎ=ÊBMI;�¡JC@ªI;³1=A³PIËP�¡��ÌÖ³P�Í¥ Ñ8>AJh´ � � ßÒ¤8â6³P�Ͷ>AJh@ªBMI  Jh´�¹¥�BM@Í@- >A@ÍJC�Í>?¶HxJC>?³MI�JC>A=AJC@JC³nѵBM�h  �

��'ßTD�ÕÙ�>VF �MF�Ù�Jh´�ªÌÖ³P�h¥ÃBvJh>?³PI ³vÌ�<�BM��JC´ � =?>?±v�ªÎ=ÊBvI�¡Jh@�>A@k°d³P¥�Î�ͳP¥Ã>A@h�¡ �F �+³vJC�ªJC´�BfJ

JC´;�Ã�Í�d@hH;=AJC@ÇÌÖ�h³P¥ ³PH�Ç@h>?¥·H=ÊBvJh>?³PI;@$°�BMI�¶���@h°dBM=?�¡ �ÌÖ³P�( >�ÛX�¡�h�dIKJY@ÍJCBM�·BvI » >A@h±ÒÎ�Bv�CBM¥��¡Jh�d�h@(Ñ8>AJh´JC´;�(ÌÖ³M�h¥EH=?BM��Î�Í�d@Í�dIKJC�¡ £>?Iª¤+ÎÎ��¡I > Ô½¢"³MÌÕG�H>?IKJCBMI�B � ²Å>?@Í@CBMH�¡� �VåMáMá,+.�UF�ê$>AØM�dIªJC´;�Ç�¡I³P�ͥóPH;@�CBvIËP�k³MÌ�³P�h¶;>AJLBv=�Î�BM�hBM¥��¡JC�¡�$@hÎ�Bv°d�Ð@CBM¥�Î=A�d ¹¶KÏÒ±I³nÑ8I�¶>AI�BM��Ï£@ÍÏ:@�JC�d¥�@dÙ�ÌÖ�h³M¥ °d³MIJCBM°¡JǶ>AI�BM�Í>?�d@JC³Ð@Í�dÎ�BM�hBvJC>A³PI@8³MÌ�I��BM�Í=AÏ-B�Î�Bv�h@h�¡°MÙ�JC´;�Ç�hBMIËP�(³MÌ¿Î[�d�h>?BM@ÍJh�h³PIªÑ8´�¡�h�(JC�¡�h�h�¡@ÍJh�h>ÊBv=ÅÎ=ÊBMI;�¡J.ÌÖ³P�Í¥�BvJh>?³PI>?@�BvÛ��d°UJC�d Ã>?@ � H>AJh�+@Í>?¥�>?=ÊBv��JC³ÇJC´�9�CBMI;ËP�+³vÌÅÎ��¡�h>?BM@ÍJh�h³PIÐÑ8´�d�Í�+Jh´�^@�JLBM¶>A=?>�J*ÏE³MÌ�<�BM��JC´ � =?>A±M�8Î=ÊBvI�¡Jh@>?@8°¡³P¥ÃÎ;�h³P¥�>?@Í�d �F/¤+@^Bk�h�¡@hH=�J�Ù[BM¶[³PH;J8ëKá·ìªèMá���³vÌÕ¶>AI�BM�h>A�d@8BM�Í�$Ñ8>? �(�dI;³PHËP´¾JC³�BM=?=A³nÑ7¶[³MJC´«JC´;�ÌÖ³P�Í¥�BvJh>?³PI~BMI; �JC´;�Ã=A³PIË«JC�d�Í¥!@ÍJLBv¶>?=A>AJ*Ï£³vÌ8<�BM�ÍJh´ � =A>?±M�ÐÎ=?BMI�UJC@Ç>?I % � J*Ï:Î[��³P�Ͷ>AJh@Ç�¡I°d>A�h°¡=?>?I;˽³PI;�³MÌ�JC´�Ð@ÍJCBM�h@¡F-��H��JC´�¡�h¥�³P�h�vÙ�BMÎ;Î�h³�Ôx>?¥ÃBvJC�¡=AÏ�ßná�� ³vÌ�¥ÃBM>?I¹@h� � H�dI°¡�-¶>AI�BM�h>A�d@(BM�Í�аd=?³M@h���dI³PH;ËP´JC³ÃBM=A=?³nÑ Jh´�(ÌÖ³P�h¥ÃBvJC>A³PI«BMI ½=?³PI;Ë � Jh�d�h¥�@ÍJCBM¶>?=A>AJ*Ï�³MÌ�Jh�d�h�Í�d@�JC�h>?BM=ÅÎ=?BMI�¡Jh@+>AI � � J*Ï:Î��Y°d>?�Í°dH¥·¶>?I�Bv�ÍϳP�Ͷ>AJh@ �:$B�Ø:>?  SU_.QMe)( åMáPá, xÙ[G$H;>?IKJLBMIB �y²�>A@h@hBMH�d�+åMáMá,+.�UF�ê$>AØM�dI«JC´�BfJ9Jh´�(ËKBM=?BfÔ:Ϫ°d³PIKJCBM>?I@8¥�³P�h�JC´BMI ßnáP᣶>A=?=?>A³PI~@ÍJLBv�k@ÍÏ:@ÍJh�d¥�@dÙ�BvI  JC´�BvJE�h³PHËM´=AÏ�´�BM=�Ì+�Í�d¥ÃBM>?I�Øx>?BM¶=A��ÌÖ³P�·Jh´�ªÌÖ³P�h¥ÃBvJC>A³PI BvI ¥ÃBM>?IKJC�¡I�dI;°d�^³vÌ�<�BM�ÍJh´ � =A>?±M�9Î=?BMI�¡Jh@dÙ;BY=ÊBv�hËP�9IH¥E¶[�d�µ³vÌÅ@ÍÏ:@ÍJh�d¥�@��h�¡¥�Bv>?I�´BM¶>AJCBM¶=A�9¶BM@h�¡ ª³PI�JC´;� ;Ï:I�BM¥�>?°$°¡³PI@Í>? �¡�CBvJh>?³PI@.³vÌ¿Jh´>?@.�Í�d@h�dBM�h°L´XF

É���JC´�BvI± Q½>?°L´�Bv�d=.¯;F�É»BnÏ~ÌÖ³P�ÇÎ�h³nØ:>? ;>?IËÒBv  >AJh>?³PIBM=�¢ ��â+@kBvJ �+¤ % ¤×¤\*�¢^F�<.F DEF GkF¿�h� �°d�¡>AØM�d £@ÍHÎÎ[³P�ÍJ+>?I«ØvBM�h>A³PH@9@ÍJLBvËP�d@9³MÌÕJh´>?@8�h�¡@h�dBM�h°L´£ÌÖ�ͳP¥ �+¤ % ¤ ê % * �¿Ù �+¤ % & �;*.¢7BMI  �+¤ % ¤��� � ÌÖ�d=A=?³nÑ8@h´>AÎ@dÙ9BMI; �JC´�£â+I>�ØP�d�Í@h>�J*Ï�³MÌ Q½>A°L´>?ËPBMI Jh´�h³PH;ËP´ãJC´� Q½>?°L´>AËKBMI㢵�dIKJC�¡�-ÌÖ³P��í.´� �³P�Í�¡JC>A°�BM= ��´KÏ:@h>A°d@ �]Q£¢µí ���UFÇ�µF ¢^F ¤·F$>?@¹@ÍHÎÎ[³P�ÍJh�d  ¶Ï Jh´� Q£¢µí �¿ÙYBMI  �9¤ % ¤ JC´�ͳPHËP´ JC´;�í��d�h�Í�d@�JC�h>?BM= �/=?BMI�¡Jk��>?I ;�d�>Q½>A@h@Í>?³PI � ����ê(áMëêkß PáPê2�(BMI  Jh´�ª¤^@�JC�h³MδKÏx@Í>?°¡@�í.´;�d³P��Ï �/�h³PËM�CBM¥� � ��ê(áMëê NÇè�+Kê(á.�UF�¯;F ¯;F ²/F�>?@$@ÍHÎÎ[³P�ÍJh�d  >AI¹Î�BM�ÍJǶKÏÒJC´;� �9¤ % ¤�¤^@�JC�h³M¶>?³P=A³PËMÏ �*I@ÍJh>AJCHxJC�ÐHI �¡�JC´;� �9¤ % ¤ ¤+¥Ã�¡@ �*IKØM�d@ÍJh>?ËKBfJC>?³MI��Ͳ�>AI±>?IËk³MH�;A$�Í>?ËP>AI@µJh³�³MH�8��H;JCH�Í� �F

Æ � � � Æ � � È � Â

-µH;Jh=?�¡�dÙ *ÇF ��FAÙ:É»�Í>?ËP´KJ�Ùx¯;Fí$F�Ù QpBv�h°¡ÏMÙ�êkFKÉ FAÙx��>?@Í°L´�d�¡Ù':EF¤YFAÙD�³PËMJdÙ % F % FAÙ:í.>?II;�¡ÏPÙ¢^FêkF�Ù;¯M³MI�d@¡Ù7ÇF�*ÇFŤYFAÙÕ¢�BM�ÍJh�d�dÙ6-^F�:EFAÙ�¯M³P´I;@h³PI�ÙÕ¯;F�¤·F�ÙeQ½°�¢�BM�ÍJh´ÏMÙ�¢^F�Ù�� ���dIIKÏPÙ/¤YF¿¯;F�åváPá,+;Ù�¤^Î�¯;Ù+vë.+;Ù�èMáPè

¢µ´�BM¥·¶��¡�h@dÙ[¯;F�<.F[åMáMá;ßPÙ �*°dBM�hH@¡ÙÅß�èPåxÙ�åMáKè

¢µ´�BM¥·¶��¡�h@dÙ[¯;F�<.F�Ù[G�H>?IKJLBvI�B;Ù�<.FDEF�Ù�:�HI°dBMI�Ù�Q�F[¯;F�Ù �y²Å>A@h@CBvH�d�¡Ù[¯;F[¯;F�åMáPáKå:Ù¤$¯;ÙÅß�å ;Ù�å�1,1vë

:$B�Ø:>? �Ù�<.F�Ù[G�H>?IKJLBvI�B;Ù�<.FDEF�Ù���BvJCH'4�4d³;Ù�Q�F�Ù �y¤^ �Bv¥Ã@¡Ù��µF[¢^F[åMáPá� ;Ù �[¤ % ��Ù�ßMß�èxÙ 1KåMè

:�H � H�¡II³nÏPÙ�¤·F�Ù �LQ½BnÏM³P�dÙWQ�FÅß �;ßPÙ¤��$¤·Ù�åvë,1;Ùë.1Kè

Page 19: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìpß Yì

</ËPËP�¡I:¶[�d�ÍËP�d�¡Ù�¤·F�Ù�â+ ��ÏPÙ % F�Ù �LQpB�ÏM³P�dÙWQ�F[åMáMáMëÙ;¤��$¤·Ù�ëß�$:Ù Kè�

��BvJCH'4�4d³;Ù�Q�FAÙ�¤+ �BM¥�@dÙ���F�¢^FAÙ�ê(BMH;Ø:>?IXÙ *(FAÙ � ���ͳP@S4¡±M³nÑ(Ù�<8F�Q~F[åMáPá,+;Ù ��¤ % �¿Ù �*I¾Î�h�¡@h@dF

7^BfJ84d�¡@dÙ[¤·F �¿F�ÙX¢µ³x°L´�hBMI�Ù�É F�:EFAÙ[</I =aÙWQ�FAÙ Q½°¡¤^�ÍJh´H�dÙW-^F�Ù �¿BMH=A@h³PI�ÙW:EF�-^F�Ù�É BM=A±M�¡�dÙ�êÐF�¤YFW7ÇFAÙ¢�Bv¥Ãζ[�d=A=VÙ -^F�Ù ����BMIËÙ % F[åMáPá, xÙ;¤^Î�¯;ÙXè �;ÙXßC ,1,

7+³M=?¥ÃBMI�Ù Q~F[¯;F � É >?�¡ËP�d��J�Ù ��F�¤·FÅß ��;Ù¤�¯;Ù�ßPß�$xÙ +Kåxß

N(BM@ÍJh>?IË;Ù�¯;F��µF�ÙÉ ´>AJh¥Ã>A�h�vÙ :EF ��FAÙ � *9�UÏxI;³P=? @¡Ù�*ÇF;í$FÅß �, ;Ù �*°�BM�ÍH@dÙ�ßná;ßMÙ�ßná,1

N$³PI�BM°L±>aÙ�Q�F[åMáPáPèxÙ �^BfJCH�Í�MÙ�ë. ,+xÙ�å� Pá

N$³P�ÍJh�dI±fBM¥�Î�Ù % F[¯;F � É��¡JC´;�d�h>A=?=aÙ�êkF;É F[åMáPáPáxÙ �*°�Bv�hH@¡Ù�ßdë. ;Ù +Pá

²Å>?@Í@CBMH�¡�dÙ�¯;F�¯;F�Ù�G�H>?IKJLBvI�B;Ù/<.F�DEF�Ù�¢µ´�BM¥E¶[�d�Í@dÙ�¯;F¿<.FAÙe:�H;I°�BMIXÙ0Q�F/¯;F�Ù � ¤^ BM¥Ã@¡Ù/�µF¿¢^F/åváPáMëÙ*8�¡Ø'Q½�¦Ôx¤^¤·Ù�åPå:Ù �

QpBM�^4�BM�Í>VÙ���FAÙ � % °L´³P=A=VÙ 7ÇF[åMáPáPáxÙ¤^Î�¯;Ù[èfë. ;Ù Kå 1

�+�¡=?@ͳPI�Ù�*(F �¿F[åMáMá, ;Ù�Q �;*9¤ % vëèxÙ�å� �

�+�¡=?@ͳPI�Ùe*(F���F � ��BMÎBM=?³P>Y4d³PHXÙ/¯;F�¢^F=-^FÕåMáPá, ;Ù¿>?I �/�ͳx°¡�d�d ;>?IËP@·³MÌ.JC´�ª¢µ³PI;ÌÖ�d�Í�dI°¡�ª³PI í�³nÑ�BM�Í @A^Jh´�d�+<�BM�ÍJh´@dÙW:9¤#*�É � �\&ví ���ãBMI; ½JC´;� % �dBM�h°L´pÌÖ³M�^<�Ô:JC�hBM@h³P=?BM�8í¿�¡�h�Í�d@ÍJh�h>?BM= �/=?BMI�¡Jh@dÙ��d XF���Í>? =AHI �Ù Q�F�Ù � 79�dII>AIËÙ�í$Fe� �+³:³P�Í ;Ñ8> Óͱ �+< % ¤ ��H;¶=?>A°�BvJh>?³PI@#:�>AØ:>?@Í>?³PIp< % ¤ % � � è� �.�UÙß�$Pè

�/>?°L´�Bv�h ³Ù�-+FAÙ % Î�BM�h±v�MÙ[²/F % F�Ù �æ¤^ËMH>?=?BM�dÙ;²�F;¤·F[åMáPáPèxÙ�Q �;*9¤ % Ù� Kè�;Ù�èPåxß

G�H�d=A³,4MÙ�:EF�ÙWQpB�ÏP³P�¡ÙWQ�FAÙ�É��d¶[�d�dÙ[²/F�ÙW-�=?�d°L´B;Ù�¤·F�ÙW-�H�hI�UJ�ÙWQ�F�Ù�¢µ³MI'"�I³Ù�-^F�Ù �^BM�UÌ�Ù�:EFAÙ ���dÎ[�MÙ��µFAÙ% BMIKJC³P@¡Ù �YF�Ù �yâ+ ;�ÍÏPÙ % F[åMáPáPá;Ù;¤ �$¤·Ù� KèfëÙ �

G�H>?IKJCBMI�B;Ù�<.F;D·F[åMáPá, xÙ;>?I«¤ % �㢵³PIxÌ�F % �d�¡F[å�MëÙ % °d>A�dIKJC>)"�°(���h³PIKJC>A�d�Í@.>?I *9�¡@h�dBM�h°L´¾³PI¾<�ÔxJh�CBM@ͳP=ÊBv��/=?BMI�¡Jh@dÙ�¡ �F�:��d¥�>?IË;Ù':EF�Ù � % �dBMËP�¡�dÙ % F�� % BMI¾���CBMI°¡>?@Í°d³ �/¤ % ���UÙ� ;ß

G�H>?IKJCBMI�B;Ùx<.F:D·FåMáMáMëÙ �/=ÊBMI�UJ.��³P�Í¥�BvJh>?³PIÐ>AI9-µ>AI�BM�ÍÏ % JLBM� % Ï:@ÍJh�d¥�@dÙí.´�¡@h>A@ � �/´�FG:EF �¦Ù;â9I>AØM�d�Í@h>AJ*ϳvÌeQ½>A°L´>?ËPBMI�Ù¤+II½¤+�h¶[³P� ��¤+II¾¤^�h¶[³P� ��â\Q ��¢µ³P¥ÃÎBMIKÏ �

G�H>?IKJCBMI�B;Ù�<.FD·FAÙ�²Å>?@Í@CBMH;�d�dÙ[¯;F�¯;FAÙ[¢µ´�Bv¥E¶��¡�h@¡Ù[¯;F�<8F�Ù �L:�HI;°�BMI�Ù�Q~F[¯;F�åMáPáKå:Ù¤^Î�¯;Ù[è�$�+;Ù ,1På

G�H>?IKJCBMI�B;Ù�<.FD·FAÙ �æ²�>A@h@hBMH�d�¡Ù[¯;F[¯;F�åMáPá�+;Ù �*°�Bv�hH@¡Ù�ßC1KèxÙ�ß

*9BMËP´�B�ØvBMI�ÙW:EFAÙ 7+�¡I�ÍÏMÙ�í$F�¯;F�Ù�Q½BM@h³PIXÙ�-^FW:EFAÙ % H¶�BM@hB�ØMBvËP�MÙ�¯;F �¿F�ÙůPBv³Ù[É F � ¢^F�Ù�-µ�dBMH=A>?�dHXÙ�í$FW:EFAÙ� 7^BM¥·¶=AÏMÙ �YF[¢^F[åMáMá,+;Ù;¤+Î�¯;Ù�+Më.+xÙ�èPå�

Page 20: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìªåMáYì

*9BnÏ:¥�³PI �Ù % F �YF�Ù[G�H>?IIXÙí$FAÙ �y²�H;I>?I�vÙ�¯;F �LF[åMáPávëÙ �*°�Bv�hH@¡ÙÅß�+,1;Ù�ß

% BM´B;Ù �¿F�Ù % JLBv �d=aÙ�¯;FAÙ �yí¿�Í�d¥ÃBM>?I;�MÙ % FÅß �.$xÙx¤^Î�¯;ÙÅßPßdëÙëKá�

í�H�h�Í>?I>aÙ :EF�Ù�-�BM�h¶;>?�d�Í>VÙ'-^FAÙ QpBM�S4dBM�h>aÙ��µF�Ù�í.´�d¶BMH=AJdÙ �¿F�Ù �yí��h>A°�BM�Í>?°d³;Ù �¿F[åváPáKèxÙ�Q % ¤�� % Ù�+xÙÅß�$På

É ´>�JC¥�>?�h�vÙ :EF ��FAÙ�Q½BvJC�¡@h�MÙ�¯;F�¯;F�Ù[¢µ�h>A@ÍÑ��d=A=VÙ�²/F�Ù �LQ½>A±:±v³P=ÊBxÙ % FÅß ��1;Ù �*°�Bv�hH@¡ÙÅß� KåxÙ�ß ,+

É >?�¡ËP�d��J�Ù ��F�¤·F�Ù � 79³P=?¥ÃBMI�Ù Q�F[¯;FÅß �.$:Ù¤$¯;ÙÅßPßC ;ÙXß�ëMëè

É >?@Í ³P¥ ¯;F�Ù �L79³P=?¥ÃBMI�Ù Q�FÅß �xßPÙ;¤�¯;ÙÅßnáKåxÙ�ßnèPå�1

<XH°L±v�d�dÙ % F�Ù�QpB�4¡�d´�Ù�í$F�Ù % BMIKJC³M@dÙ �YF[¢^F�Ù�â+ ;�ÍÏPÙ % FAÙ � Q½BnÏM³P�dÙ�Q~F[åMáPáMëÙ;¤ �$¤·Ù�ëå +;Ù +�Kè

� �A� a�i�l]cji�l)�Gq3��d msa i�l]cjirmslc �Bd �9���G���rc�����;���� ��� ( mhobl]uha v��f �f

Page 21: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìªåxß^ì

í¿BM¶=A�kßPF6í.´�2A�H;JC�¡�h¥�³P@ÍJ % JCBM¶=A� % � J*Ï:Î��2A��h¶;>AJ � � �j�

��� ��� V�� � ��� V�� � ��� � � �( (� � � (� � � (� � � (� � ( (� V V(� � (� V � (� � � � (� ( � (� � � (� ( � (� � V � � (� ( � (� ��� � (� ( �

Page 22: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìªåPåÇì

í�BM¶;=?�ÇåxF -µ>AI�BM��Ï % JCBM� ��BM�hBM¥��¡JC�¡�h@

����������� ������ � � � �������� � �������������� �

!� V ( (� � V � �� � ( (� � � V � �� � ( (� ��� � V � �� � V ( (� � � � �� � � ( (� � � � V � �� � � ( (� � V � � V � �V ( V ( ( � � �V ( V ��� (� � � � � �V ( � ( (� � � � �V ( � ( (� � � � � �

����� ! � V ( (� � V � V (� � V ( (� � � � � (V ( V ( ( � � V (V ( � ( (� � � � � � (

�����#" � � V ( (� � � V V ������ $ � � V ( (� � � � � �!&%�' �)(�* ��+,� ��� � *-(/.-010 + ���324* �5� 246 ��7 .8�924* ��� . + �): + * ��; �1<�.-0101* + <�2 � : �9*�� ' �6=. �9� � � *-(��

' �?>@2 � . +9AB� �3. +3� ����� �C�ED ! �FDHG � (� � DHI�� . � <J����� !�ED ! �KD G � V DHI��

' .1LM�N� ' � � .-6�� � �9� 747 . + 6=. �9� + .8�924* � *-( � � V�� � O � ������" �ED ! � (� � DJI . � < DHG � V DHI���P � � � � � P,Q' 2 7 �R�����5$

�ED ! � V DHI . � < DHG � (� � DHI�� ' . � � � V�� � �S � + �12 �TP�D ! 2 � <�240U.8�9� �� ' ��V ;�+ 246=. +WA/XY� �Z. + . + * ��� < Q' 240 ' � ' �5<@2 �3[ 2 � 0U� � �3� + �U< P . � < D G 2 � �

' �� �3� 747 . + 01*&6 ; . � 24* �

Page 23: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìªå� Yì

��� ���� �� � � � �� � ��� ���� � ��� � � � � � � � � � � � � � � �

��� �� � � !"� #%$ #%& ' $( )* ' $ ( )* + ', - $ - $ +/.0 1 & 2354 23�6 7 8 7/9 : 8 : 9

;< => ? ? @ => @ => A = => B ? => A ? => < C => B B D E> A D< > ? < > B E => C E

; @ => C ? D < > D = => C< => BF => ? @ => < D => A D E => E D< > D < > C B => C<

; E => F C ? D < = => B = => E C => ? @ => < D < > = = E @> A D E> E < > F B => B C

;< => @ ? ? D> @ = < > D @ => ? A < > E D => < C => ? = A> B D A> F < > E A => C A

; @ => B @ ? D @> D = < > D @ => C A < > @ E => < F => BF DF > A F > F < > E D => F <

; E => F < @ ? D < > C => D => A C => ?F => F ? => < E => B E D E> @ < F > < < > ? @ => CF

;< = = ? D> @ < > @ @> = C => C C @> ? = => @ D => ? = => @ D A> ? < > D A => F E

;< D> D > @ ? D D => D < > BF => ? = < > ? = => < E => E< ?> D B @ C> = < > D< => F ?

; @ => ? D @> D = < > ? B => ? A < > D A => < B => ? @ D => F < > C < > D< => F C

; E => C ? ? < > F = < > E C => E ? @> = B => < D => BF @ B> E < @> E < > E E => F <

G < => ? < = < > F => B => F C => B @ => A A => < B => C D D ?> ? @ A> @ < > B @ => C E

G < => @ ? D = @> F => ? < > B ? => ?F < > F < => < C => ? B A> F D => < < > D B => F D

G < = = < = D> F => C @> < ? => B E @> CF => < F => E C => = @ ?> C < > @ @ => A =

G E => C ? @ = @> B => @ < > F ? => ? ? < > A A => < ? => B = < A> @ C> ? < > @ B => F C

H < => @ ? @ I D ? @> F => B < > = ? => F < < > = B => < @ => ? D => = C @> E < > B B => C E

J < => @ ? < I D ? D> E => @ < > ?F => B< < > C A => @< => ? E @ ?> ? => D < > @ E => F F

KL M K N N N E> = => = N N N N N N => ?< N N N N N N N N N N N NOP O D< D> = => C N N N N N N => ?< @ D> A @> = < > @ B => F C

OQR D E> D < @ N N N N N N => D A => = => ? < > = B < > =<

OQR S ' T @ ;U V D D> = => C N N N N N N => EF => = < F > C W < > @< => A =

X HYR ; SZ [ = \ V E E> D = N N N N N N => E = < < > B => F < > < @ => A E

W K]^ ^ _`^ ab _Q ^ c]^ ^ YR deR f Q b eR b _]R Y a^ I ceR `g b _]R Y a^ hYi `R d @ ; U >

Page 24: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìªåvë·ì

��>AËF�ßPF � ����������� ����������������������������� �"!#�%$����&�'���(��������$�)*���+,�-! ������. Ý0/21�35476 )98 Ý0/:3<;>=�? )7����@�AB�����'�C��$�$#$����(�,$9��� 1EDTH )<��$9$����F! �G���C�����IH���$��9�J!K�L+M�����'�C��$ ; �����I������N�@��PO �������+M��Q ���"!#����G�����$��E�J!K�$����L�����(��������$��(�E�����&$����(��� ���*�����R���S����T����(�������U��$������(�I�����VW�����������$����X���Y����(� 1V476[Z �\�]�����L$��+M����@^�����W_��$`$������a���@b�c����!K�(��@%QSN 1 �C�������L��������Td����$e����QW��� ; � ������������@b+M���\���C�b�f���������N<$L�����C�"!#�g$�N<$�����C$V�(�&�����+M�������$�h���'@�����Te�����C�I�������,@����#���L@��������$������(���I�����I@���������T����+M� ���i���'������������NL����(��QBNR����Q'����$ ; ������Q �B@����$j��������V@'��$�kG�(���`��������$���l���@dQSN�+�����+����$�! ����$��`$���m��$ �(���`'���� ���������������h���X�����e'�lN<$���+����Y$���m��$7���n�����`Q �<@����$�)����@U! ����$��R���B+��(�������'$E$����F!o�����R����Q'�������p$���C���C�fq����e�srB�$e����@U�+�+M��S������+��������$t���9�����R��������$���l���@gQ �<@����$������(�������7���`����� +M��S��������$����(� ;*u �R����� ��������@R+M�������X�v)�Q �B@����$n�c���j!I����+�� Z 8

� ��w 8 �Fx _ ��y Z . � ��w . �Fx _ �ez 3<;{3�3�1 )! �������V8�����@d.

��(���&�����e�+�+M��S������+����"N]����@]$���C�\�C�fq|���E�sr<�\$7���n���+��]W�����������$����X���c}f��VQBNB����)'�(���`W���������@

���R���@ Z �a���9�����7Qh�<@����$p�a�����~�����7H'��$��j+M�������X�W_�����@����RQ'����� Z �a���j������+M�������$� ����@�����TEQ �<@����$n���R������$��+M����@+M�������X�W_ ;j� �����&�����(��! �'�����E�����$��V$�N<$�����C$ $�����[AB�����������(���������NG$��\�C�����(�7�(����(����NG�����C�$�)������e�"!#��$�NB$�����C$Q ��T��������5@���������T���!I��������� ?(3�3 N���(��$����I�����]$����L�����(������� ; ������$��X������+�������T��^���������]���������\���9+M����@�����������$�������\�C�(�����Ng�����@�$&���d�������c���,�C�(�������5���7�"!#�U������N%@'�POh������l�`W�����������(��N5$�N<$�����C$)n�d'����������$V������$���$ ? )j��$$����f! �]���������eH'����� ���f! ;

Page 25: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìªåPèÇì

��>AËF�å:F � � ���V�����C�&�����������������d���9�����L$���C���C�fq����E�sr���$ Z .�_,)h�+�+M��S������+����JN Z 8

�_,)v����@^�\��+��������(������� Z��

�_ ��$

$����f! �`�a����� '�����������$����C���(���L���V�������������s����Q'���Y����(� 19476 Z ��� ������'������\$,_,)s���'@`�a�����������������p'�����������$����C��������(�#Qh��T����G����(� 3<;���?&4760Z ���f!#�����e'������\$,_,)l�a�����~�����IH���$�� 1�3�3�3 N���(��$#���v�������"!#�R$����L�����(�������'$*$����F!I�C���� ��T������ 1(;IZ �l_ u �������t����]H'T�������)������`���'��������������Q'����$����p�����e�J!K�C'�����������$����C����$�@���Oh����QBN 1 ���������E������������������U������������N�)h! ���\���`�����i���������E$�N<$����� '�(�������������,$E�(���&��@���S����+���� ;`Z Qh_ u �]�����&Qh��������� H�T�������)'�����L�J!K�'�����������$����C����$tQ ��T����%���%��@���S����+����*����Q'����$`����(� 3<;���?]476 Z ����$��d$����f! �%���5���@5����@%Q'�����f_ ; � ���X+��'�(������+Q �����<�����I���*�����$��&$�NB$�����X$I��$ �(�'�(����S� ��(����N]���������L$����L�����(��������$)�����@d�����V����Q'�������v��������S��$ ���j����(��QSN�����fq��+M���������$I@���������T��`!I�������iN��('�'���F���������$7����� 1�3�3�=(3�3 N���(��$ ;

Page 26: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìªå�+Yì

��>AËF ;F � �����&����� �������p�����������������U���9����������$�N<$�����C$t�a�������B��� 4 �\$E$����F! �g��������)v! �����^���+��bQ �<@�N]��������R@���$�k�����'���$���S���@dQBN]Q'����+�k]$�������@^+�����+����$ Z ! �����U$�N<�VQ ����$���m��$I����� ���������������Y���GW���������I$���m��$,_ ; � ���$�����������G$����L�����(��������$t���+,��Qh��T��\�b! �����b�AB�����j�X��$�$V$����(�,$V��� 3<;>?dD H ����@ $���C���C�fq����&�sr���$`. Ý /[=(3d476&;������$����L�����(�������'$V@��PO ���R���5��������L$�����\���(�&�+�+M��S������+��������$ Z ����@ �����������a������h���,����$������l_��X8 Ý / 3<;��(? ����@�� Ý/ ?d476 Z H'��$��V+M�����'�C�W_,)�8 Ý / 3<;��=�? ����@� Ý /��S;>?]476 Z �C�\@�@�����+M�������X�W_,)�����@ 8 Ý / 3<;>? ����@� Ý /1�3g4762Z ���'����@�+M�������C�W_ ; � ����@'��$�k5��$L+�����(����N%��������+��(���@-��� ������� Ý /:?U476 ����@ �^476 $����&�'���(��������$�)Q'����$����\���#@�NB�����X��+�������N5�Mr�+������@ �\� ���+,� +���$�� ; ���������C�����l�X���I�C��$�$C�����(�C��$�����$�� Z �F�������(T��@ �a���C���+,�$�N<$�����G_j��$9�(�'���r����C�(�����N �B1� Z � Ý / ?V476 _,)���� [Z � Ý�/��S;>?&476 _,)<����@���� [Z � Ý�/01�3&476 _ ; ����� H'�����'����������$7�c���,���@��c����� �J!K�G��@�@'�������������h���������m�(��������$����n���+��^$�NB$����� Z ! �����������`$������V$�����\���(�7'�(�������������,$,_�(���`$����F! �����������e����$��K���F! ! �����GT��,�N�����@��� ���+�����+����$��<��������K��(�,��NX����������������� Z ������$����f! �W_#����$�$����C�����(��������@'$���$7�����V$����&�'���(��������$����f! ��! ������QW����+�k�$�������@�$�NB�&Q ����$ ;

Page 27: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìªå,$Çì

��>AËF(ëF � � ���R����� �������p�����������������g���#������Q �B@����$I���U������@��\$�k]�a����� ����������$����L�����(��������$ ��� �B��� 4 Z D �/0D � /03<;>?GD H _,)W���+,�^���*!I����+��]Qh��T����d! �����^�CQ'���'�(��NG �����\��$������������ � Ý / �S;>?X476 ) �(���V��������$���S���@���b���+,��+M�������C�%! �����bQ'�\��+�kbH'�����@5+�����+����$ ; �����G$����L�����(��������$e@��PO ���&���5�����G$�����\���(�&$���X���C�fq����&�sr<�$&. Ý����@��+�+M��S������+��������$I8 ÝK;ju �������tH���$���+M�������C�i)B. Ý / 1�3R476 ����@�8 Ý / 3<;>=�? )'���G�����e�C��@�@����I+M�������X��. Ý-/=(3�476 ����@g8 Ý /03<;��=�? )i���'@^���d�����L��������@^+M�������C�^. Ý / � 3�476 ���'@U8 Ý / 3<; � 1=�?B; �����&Qh���������:���f!@���$�'���N<$e�����X���$�������$V���7�J!K�U��@'@��������������*$����&�'���(��������$ Z $����F! �%QSNgT����FN%����@%��h�� +�����+����$ _E! ����+,�bQ ��T����! �����U������$����C�C$���������(�t'�(�����C��������$ ; �B��� � ��T����������c���`���g�Mr<'�����'�(�������g���9������$�N<�&Qh���\$ ; � �(�,��N^���U���+,�$����L�����(�������v)��C���lN����n�����`W�����������$����X����$7����(�������V��������� �@�T��&���������V@���$�k��(���V����$��7�c����� �����`$�N<$������)h��$�(��������� �������E�C��$�$������7��&Q���N���$K����$��\�&���\�(��������$n�����(�#Qh��T��\�R! �����C���(��T����#. Ý ����@X8 Ý�; �����7���������h�C��$�$#����$�$�a����� �����e���������`�\�l����T����(��������$7��$7+M����'�(�,�(Q'����) � ?(3� )'������������T�������$��7���������`�C��$�$7���'�(����$�����$��7�a����� ������������I�+�+M��l���,��+ QW�����(��NR$����(��$�NB$�����C$ Z �X��@�@��������'@C�������,@C+M�������C�'$,_p�JNB'��+����\��NR���@�$9��XQ �����Te����C�F���@�QSN'��$�$�����TR���S�G+�����$�� Z ! ��������� 3<;�1V476 _K���C�����&+M��l��������$����(� ;

Page 28: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìªå�1Yì

��>AËFEè:F � �����R����� �������n�����������������g���9������Q �<@����$E���U�����C@���$�k��a����� ���������C$����L�����(��������$I��� �B����� Z D �/~D � / 1VD H _,)����+��^���n! ����+,��Qh��T��\��! ������. Ý / 1�3C476 )W�\$7$����F!I�]�������+��U+M�������X��! ������Q'�\��+�k�H'�����@+�����+����$ ; �����$���$����L�����(�������'$&@���Oh���R��� ������Q'�����(��Ng�+�+M��S������+����"N����'@ �����\��$������ �G8 Ýo/ 3<;>? ����@�� Ýo/ ?476 Z �����a�R+M�������C�W_,)j8 Ý /[3<;>=�? ����@ � Ý / �S;>?d4762Z �C��@�@'���C+M�������C�h_,)n���'@�8 Ý /[3 ���'@ � Ýo/ 1�3^476Z ����T��S��+M�������C�h_ ; ������Q ��������� ���F! ����$��5@'��$�'���FNB$L���������$�������$R��� �"!#� ��@�@����������'���K$����&�'���(��������$ Z $����f! �QBN^T����FNU���'@g��h��%+�����+����$,_I��$�����T������C$������C$�����\���(�e'�(�������������,$ ; �B��� � ��T������C���a���e�������Mr<'�������(�������g���������$�N<�VQ ����$ ; �����$���$����L�����(��������$&@'��$�'���FN5$����C�\���(�&��+�+M�����������-��������$�+������$)9����@����$������L����$��\�C�����(�&H'�����'�����������(��NL$�NB$�����X$�)S��$#����������T�����$#$����L�����(��������$n�a����� �<��� 4 ! ����+,��������I����� $������E$���������(�j�X��$�$j���(������� /3<;>? )lQW���*+M����$���$��*���h�AB�������C��$�$j$����(��$*��� 3<;>?`DTH#; ������Q �<@����$n���L������@���$�k&��� �B�����E)l���f!#�������F)S�(��� $�����T��S����N���$�$ ����������Q �@��������^������$��L��� �<��� 4 @����`���G�����&$��C���\�����I�C��$�$ ���(�����X���j�����&'�����������$����C����$,}f��&Q���N���$ ��������V$����(��$�)�! ���\+��������@�$����X$�N<$�����C$�!I������$�����T��S����NX�\�(��T���������@��\��� �MrB����S��$ ���'����������$��`�a�������@d��� �B��� 4&;

Page 29: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ìªå�Yì

��>AËF�+;F � �����#����� �������S�����������������&���'���������7$����L�����(�������'$ Z $����f! �R���&���+��C+M�����'�C�VQBN`Q'�\��+�k`H'�\���@V+����,+����$,_! ����� @��PO ������S�V$���������(�L�C��$�$&���(������$�)nQ'���`�����G$������X����QW�������j'�(�,������������$�� � Ý / �S;>?^476 )n. Ý / 1�3^476 )����@g8 Ý /~3<;>=�?B; �����V�����c�E+M�������C�^$����F!I$I��$�N<$�����[!I����� � /0= }(� Z D � /~3<;>?�D H ����@ D � /[1&D H _,)�����R$�N<$����� ���d�����L�C�\@�@����`+M�����'�C�^�'��$ � / 1 } =UZ D �G/ D � /[1�DTH _,)v����@^�����L��������@^+M�������C�U$����f! $� / 1 }(� Z ��� ! ����+,� D �d/ 1�D H ���'@ D � / 3<;>?^D H _ ; � ���XQ ���������2���F! ����$��U@��\$�'���FNB$e�����G���$�������$���n�J!K����@'@��������������v$����&�'���(��������$ Z $����F! �dQSN�T����FN]����@��� ��d+����,+����$,_���$�����TR�����&$������V$�������\�(��'�(�������������,$ ;�B��� � ��T������e�`�a���������t�MrBW�������(�������G���i�����t$�N<�VQ ����$ ;*4 ����������T��G�����t���������S�����Y�C��$�$K�����(�7��$K����$������C�����$��$�N<$�����C$7��$�AB�������t@��PO ������S� Z �����F�������(T��`��� �(= ) � 3� )�����@ =�? �a����+M���\���C��$ 1 ) = )�����@��B)����$� �+M���������N�_,)�����e�a����+M�����������*�C��$�$����������V���(��T��$��7'���������7!I���������G���+��U$�N<$����� ��$7+M����W�(���(Q'����) � ?(3� Z � � � 3<;>? _7���������,�(T�� ;

Page 30: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

��>AËF�$xF � �����#�+�+M��l�����\+����JNV��$p�I�a���'+M�������`����$���X���C�fq����p�sr���$Y�\$Y$����f! �&�c���n���������������9H'�����l'����������$Y�c���,���@���L�AB�������J�C��$�$nQW�����(��NV$����(�j$�NB$�����C$*! ����� � Ýb/ ?t476oZ ����C'������a_,) � Ý5/ �S;>?t476 Z �X��@�@����K'������a_,)�����@ � Ý/~1�3L476 Z Q ��������� '������c_ ; ����� ����@�����$j���v���+���$�N<�VQ ���'�\$j����� ���������������<���&����� Q �B@�N&�����(�K���9��������$���S��$�)����@G�����t���������$����,�����'W����������$K���X����� �B���\�(� �<NB$����� Z �(�7������� =(3�3�3 �� �B+,�W_9�(���t��������$���S���@�QSNXT��������H'�����@+�����+����$E�\�^���+,�5'��������a���`+M����'�(�,��$���� ; � ���R���@b$�N<�VQ ����$E��������$���l�tQ'�\���(��N]$�N<$�����C$e�a�������B��� 4 ! �����D ��/0D � /~3<;>?�DTH )W! �������t�����VQ'�����`$�N<�&Qh���\$7��������$���l� $�NB$�����X$ �a����� �<��� � ! ����� D �R/ D � / 1(;{3D H ; � �����J!K�d@���$�������Q'����������$ �a���e���+�� � Ý �(���G+M����'�(���(Q'����)Y������������T��gW�����������(��NU ����������Q'�(��������$t���g������B��� � $��\�&���\�(��������$��(���L������(���������N]$��C��������� �������^������$��L��� �B��� 4 @����&���G�����R$��C���\����� ���(�����X���j'�\��������� �����$����(�`�C��$�$�)i! ���\+��U���$�������$E�\�U���$�$t���l�����,�����p�Mr<+������(������� ; � ����$I�MOh�+M�V�\$I���<��@���S�`���^�����C���(��T����`�B���&Q ���E���'�����������$����C����$������(�I���F���&����C�������@^+�����$��V���G�����&+M��S�������p$����(�t��������� �B��� � $����&�'���(��������$7$����F! �^���]���+,�'������ ;

Page 31: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ì9 ;ß^ì

��>AËF#1xF � � ���&@��\$�������Q'�������������j������$���C�\�C�fq|���t�sr���$ ���9�����&��������������$��tH'�����Y'���������E�a�������@^�c���tQ'���'�(��N$����(�E$�NB$�����C$7! ������� Ý /~?R476 Z ����dW������c_,) � Ý / �S;>?X476 Z �C��@�@����I'������c_,)�����@ � Ý / 1�3C476 Z Q ���������'������a_ ; � ��� ���@XQ'�(��$#��������$���l�K$����L�����(��������$j�c����� �B��� 4 ! ����� D �`/ D � / 3<;>?LDTH )B! ���������$#�����IQ'�����Q'�(��$���������$���S��$�N<$�����C$7�a����� �<��� � ! ����� D �&/0D � / 1(;{3GDTH#;94 ��$��C$����F! �����������`�C��@�@����I'������i�(��������C���$�������$e�a����� �B�����~�\�g! ����+,� D �]/ 3<;>?dD H ����@ D � / 1(;{3gD H~Z $�������@bN���\���F!0QW�(��$,_,)n����@b�a������B�����:! ����� D � / 1(;{3%D H ����@ D � /:3<;>?bD H Z $����\��@�Q'����+�k��������f_ ; 4 ����������T��������]$���C���X�fq|�����sr<�$�Mr<�����@����C���(��T���� �s�������$7����Q'�����(��NG$�NB$�����C$7! ���������(��T����� ��������$��������i)S�����`�\���������@�T��`���p�����`@���$�������Q'�����������$t������T�����N^@����������C�����@UQBN^�����C���������e�@�T������������C�\�����������p@���$�k^���#��&Q���N���$)���$`���g�����C$�����T����R$����(�L+���$���)� ; � ; )B����������$����+M�����i@���Oh������S�9$�����\���(�9+M����'���'������$9�'��$9�V�X�������C���B�MO �+M�#���X�����I�\�������j���������$���������������T������ ;

Page 32: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ì9 KåÇì

��>AËF xF � ������$���X���C�fq����9�sr<�\$j���h�����������������C��$��9H'�'���<'���������*�a�������@C�\�����+��G$����L�����(����������$#�e�a�'��+M����������*Q'���'�(��N�h���,����$��������v) � ÝK; �����&���@U$�AS�'�(���&$�N<�&Qh���\$7��������$���l�EQ'�����(��N�$�N<$�����C$I! ����� D �X/ D � / 3<;>?D H Z �<��� 4 _,)�! �'����� �����eQ'�����E����������T����t$�NB�&Q ����$K��������$���S��$�N<$�����C$�! ����� D �R/oD ��/ 1(;{3CD H Z �B��� ��_ ;4 H'�7��������� Z =�� _�$�������@��(�,@�@����B���(���������c���7Q ����� �B����$ 4 ����@ � �(���`����$���$����f! ���������@�����@�����Q'�\��� ; ������(�������$7�a����� �B��� � Z ! ��������� /~= }(��_7�(���&$����f! ��! ��������������T��VW����$�$�N<�VQ ����$�)����'@�������$��&�c����� �B��� � Z �/:1 }(��_E�(���C@��\$�'���FN��@^!I�����^�\��T��l�tQ'�\����� $�N<�VQ ����$ ;`� �����C�����(�t�����C$�NB�&Q ����$ �a����� �B����$ � ���'@ � ���F���Q ������(Ov$�����QBN S3<;>?X476 �c���E+����(�����"N ; �����e�Mr< �+M���(�������]�(��������)'���'@]����$��������V! ��@��������n���+��^@���$����,��Q'���������i)T����f! �����C����(����NG�\������(�7� ��$���������! ����������+M�����$��\��TR�s�������$7����QW�����(��NGh���,����$���������� ÝK;

Page 33: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ì9 , Yì

��>AËFàßná;F � �E��$�����T������X$X���t�����d�B���&Q ���C���eH'�����7W����������$��a�������@ �c���GQ'�����(��N�$����(��$�NB$�����C$C! ����� � Ý/ ?�476 Z ����%W������c_,) � Ý / �S;>?d476:Z �X��@�@����L'������a_,)Y����@� Ý / 1�3]476:Z Q ��������� '������c_ ; �����C+M��������$+M�������$�h���'@&���e������@��PO ������l�*$�����$j���W���'��$���$9@��$�+M����Q �@L��� � ��T������ � ; �������"NS'�\+������S���&Q ���n���WH'�'���SW����������$+�����(����NC����+M�����$��$�����$�N<$�����C$K! �����G���(��T����7$�������\�(�# ��������$��������v)S���'@����\$��&!I����X�����E+M����W����������$����(����$K���$�$�C��$�$������e�������������V������C�(��N Z �c���E��T�������]$���������(� �C��$�$7���(�����S_ ;

Page 34: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ì9 Më·ì

��>AËF�ßPßMF � �I��$�����T������C$e���K������H'�����*�X��$�$��$t���K'����������$t�a�������@g! ���������UQ'�����(��Nd$����(�V$�N<$�����C$t!I����� � Ý/ ?�476 Z ����%W������c_,) � Ý / �S;>?d476:Z �X��@�@����L'������a_,)Y����@� Ý / 1�3]476:Z Q ��������� '������c_ ; �����C+M��������$+M�������$�h���'@g���������C@��PO ������S�`$�����$e���K������$t��$`@��$�+M����Q �@g��� � ��T������ � ;�4 ����������T��g�����C$���m������#�����C$����(Q'�������T������^$������\��kB$���$ � Ý T�����$E$��C���������)������V���@'�����]�C��$�$ ���n�����`H'�����i'����������$�@��S�$I�������(�(��N�T�����(����N��a���I�T������� � Ý )�$���T�T��$����\��TC�����(��W�����������c���,�C�(������������X������$����X+�����S� ���������V$����(Q'���e����T�������$ ;

Page 35: msequintan/WB_Publications/wbfinal.pdf · 2007. 1. 6. · Ç@ÍJCBM ÌÖ³P Í¥ BvJh>?³PIªÎ; h³:°d d@Í@dÙ[BvJ8=A BM@ J ÌÖ³P 9@h³P=?BM

ì9 KèÇì

��>AËF ßnåxF � �E�\$�������Q'����������$`���I�������+�+M��S������+��������$R���EH'�����#'����������$R�����(�C�(�����������]�C��$�$����������������^�(��$�(����$����F!I�%�a���L$�NB$�����X$V! ������ Ýo/ ?^476 Z ���� W������c_,) � Ý / �S;>?U476 Z �C��@�@�����'������c_,)*����@ � Ý / 1�3476[Z Q ��������� '������c_ ; �����V+M��������$E+M�������$� ����@d���G@���Oh������S�I$�����$ ���*���'��$���$E@��$�+M����Q �@]�\� � ��T������ � ; ������C�fq��������"N5��� '�\��������$V����Q'���L��������(����N5+�����+��'���(� Z 8�� 3<;�1 _&����Q'����$L@��$�'�����G����������Fr<���X���JNb����������$���������(�+M����'���'����� ;