2023-10-26-世界银行-2023年9月贫困与不平等平台（PIP）更新_新增内容（英）_31页_576kb

报告摘要

The 2023 September update to the Poverty and Inequality Platform (PIP) revised global and regional poverty estimates for 1981–2021, incorporating new survey data and auxiliary data updates.
COVID-19 pandemic data significantly increased regional coverage, allowing regional estimates for 2020 and 2021 in most regions except Sub-Saharan Africa and the Middle East and North Africa.
Global poverty at $2.15 PPP rose from 8.5% to 9% in 2019, with India accounting for the majority of the increase. Other poverty lines showed minor or no changes.
Welfare aggregates, CPI data, and national accounts were updated to ensure comparability and accuracy.
A total of 63 new country-years were added, including historical data from wealthy nations, enhancing data coverage.
Changes in methodologies, such as India's reweighting approaches for consumption data, affected comparability and trends.

Costa Rica 2021: Corrected temporal deflator errors, affecting poverty and inequality estimates.
India 2019/20: Revisions aligned with new fiscal year data; changes in reweighting and imputation methods.
Luxembourg Income Study (LIS): Added historical data for European countries, with adjustments for comparability.
West African countries: Updated temporal deflators to align with 2017 ICP reference year.
Zambia 2010 and 2015: Adjustments to consumption aggregates for better consistency with national methodologies.

CPI data sources updated to the IMF's International Financial Statistics, improving inflation adjustments.
National accounts and population data revised to current standards, with minor revisions primarily for Sri Lanka.
New coverage rules for pandemic years ensured data was from surveys conducted during the period.

The update added 63 country-years, mostly for high-income countries like Canada, Luxembourg, and the United States, as well as for India and other nations, bringing the survey count to over 2,200.

South Asia experienced the largest increase in extreme poverty (2.5 p.p.), while East Asia, Europe, and high-income countries saw no significant change.
Latin America and the Caribbean showed a slight recovery in 2021 after a minor decline in 2020.

Data coverage for pandemic years reached 62% in 2020 and 34% in 2021 under stricter rules.
A comparability database was enhanced to track metadata, aiding users in understanding regional changes.

The update improves data reliability and coverage, providing more insights into pandemic-related poverty changes.
Challenges remain in low-income regions with limited survey data, constraining full global coverage.

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