2025年9月贫困与不平等平台（PIP）更新

September2025Update to thePoverty andInequalityPlatform (PIP) What’s New Agustin Arakaki,Danielle Aron,R. Andres CastanedaAguilar,Tony Fujs,Ivan Gachet,Christoph Lakner,Gabriel Lara Ibarra,JonasLønborg,Daniel G.Mahler,Kelly Y. Montoya Munoz,Francis Mulangu,Mario Negre Rossignoli,Olive UmuhireNsababera,Minh C. Nguyen,Sergio Olivieri,Ana Maria Oviedo,Juan Carlos Parra,Zander Prinsloo,Diana M.Sanchez,Tomoyuki Sho,Samuel K.Tetteh-Baah,Leopoldo Tornarolli,Martha C. Viveros Mendoza,Haoyu Wu, September2025 Keywords:What’s New;September2025;Missing countries;Regional Public Disclosure Authorized Development Data GroupDevelopment Research Group GLOBALPOVERTYMONITORINGTECHNICALNOTE47 Abstract TheSeptember2025update to the Poverty and Inequality Platform (PIP)introduceschanges to the data underlying the global poverty estimates.This documentdetailsthechangesto underlying dataand the reasonsbehind them.It also explains the change inmethodology used forcountries without data, as well asaminorchange in how surveysare interpolated.Finally, theregional classification used in PIP has been alignedwith theWorld Bank classificationas ofJuly 2025, although userscontinue to beable to construct All authorswerewith the World Bankat the time of writing. Corresponding authors:Christoph Lakner(clakner@worldbank.org) andMinh C. Nguyen(mnguyen3@worldbank.org).The authors are thankfulfor comments and guidance received fromDeon Filmer,Haishan Fu,andLuis-Felipe Lopez-Calva.Wewould also like to thank the countless Poverty Economists that have provided data and documentationand patiently answered our questions. Without them the database of household surveys that underpinsthe World Bank’s global poverty measures wouldnot exist.The authorsgratefully acknowledgepartial The Global Poverty MonitoringTechnical Note Series publishes short papers that document methodological aspectsof the World Bank’s global poverty estimates. The papers carry the names of the authors and should be citedaccordingly. The findings, interpretations, and conclusions expressed in this paper are entirely those of the authors.They do not necessarily represent the views of the International Bank for Reconstruction and Development/World Contents 1. Introduction.................................................................................................................................22. New Method for Predicting Welfare Distributions for Countries Without Any Survey Data....73. Changes in Line-up distribution methodology.........................................................................104. Changes to welfare distributions...............................................................................................124.1. Bangladesh 2022................................................................................................................124.2. Ecuador 2003, 2005 and 2006...........................................................................................134.3. EU-SILC............................................................................................................................144.4. Luxembourg Income Study (LIS)......................................................................................144.5. Mozambique 2019.............................................................................................................154.6. Paraguay 2022 and 2023....................................................................................................164.7. Uruguay 2000.....................................................................................................................165. Country-years removed.............................................................................................................175.1. Hungary 2018-2022.........................................................................................................176. Economy-years added...............................................................................................................176.1. Madagascar........................................................................................................................186.2. Rwanda..............................................................................................................................187. Changes to CPI data..................................................................................................................187.1. Madagascar 2012-2021......................................................................................................198. Changes to national accounts and population data...................................................................209. Comparability database.............................................................................................................2010. Flagging data points with non-national survey coverage.......................................................21References........................................