2025年9月贫困与不平等平台（PIP）更新：新增内容（英）

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,Nishant YonzanandNobuoYoshida. September2025 Keywords:What’s New;September2025;Missing countries;Regionaldefinition Public Disclosure Authorized Development Data GroupDevelopment Research GroupPoverty and Equity GlobalDepartment 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 constructtheir own regional aggregates from the underlying country-level data.Depending on theavailability of recent survey data, global and regional poverty estimates are reported upto 2023,togetherwith nowcastsup to 2025.ThePIPdatabase now includes55newcountry-years, bringing the total number of distributions to over 2,500 for 172economies. 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 acknowledgepartialfinancial support from the UK government through the Data and Evidence for Tackling ExtremePoverty (DEEP) Research Programme.This note has been cleared byUmar Serajuddin. 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 no