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100 _aRavallion, Martin
245 _aWhat can we learn about country performance fromconditiona l comparisons across countries
_cby Martin Ravallion
260 _aWashington, D.C.
_bWorld Bank
_c2000
300 _a23p.
440 _aPolcy researchworking paepr 2342
999 _c283272
_d283272