世界银行-2023年9月贫困与不平等平台（PIP）更新：新增内容（英）-2023.9-31页_597kb

This document details the September 2023 update to the World Bank's Poverty and Inequality Platform (PIP), focusing on changes in data underlying global poverty estimates. Key updates include revisions to welfare aggregates across multiple countries, such as Costa Rica, India, Luxembourg, West African nations, and Zambia, to ensure consistency and accuracy. Additionally, 63 new country-years were added to the PIP database, raising the total number of surveys to over 2,259. Updates to consumer price indices (CPI), national accounts, and population data adjusted the deflators and inputs. Global poverty estimates from 2019 and earlier were revised, with some upward shifts observed, particularly in South Asia and Sub-Saharan Africa. Regional poverty estimates for pandemic years (2020-2021) are now available for regions with adequate data coverage. India's poverty data from 2019 was reanalyzed to match newer estimates. The update aims to improve data comparability and reflects minimal changes due to refined auxiliary data.

\boxed{\text{Summary of September 2023 PIP Update: Revisions to welfare aggregates, addition of 63 new country-years, updates to CPI, national accounts, and population data; upward revisions in poverty estimates for South Asia and Sub-Saharan Africa, with India as a major contributor to global poverty increase.}}