Price Indexes, Inequality, and the Measurement of World Poverty
讨论了购买力平价价格指数对全球贫困和不平等测量的影响，指出ICP修订导致全球不平等上升，并批评了全球贫困线的不当更新，建议更多使用国际监测调查的自我报告。
I discuss the measurement of world poverty and inequality, with particular attention to the role of purchasing power parity (PPP) price indexes from the International Comparison Project. Global inequality increased with the latest revision of the ICP, and this reduced the global poverty line relative to the US dollar. The recent large increase of nearly half a billion poor people came from an inappropriate updating of the global poverty line, not from the ICP revisions. Even so, PPP comparisons between widely different countries rest on weak theoretical and empirical foundations. I argue for wider use of self-reports from international monitoring surveys, and for a global poverty line that is truly denominated in US dollars.