The World Bank measures extreme poverty using household surveys that capture consumption or income data. Here's how it works:
- Step 1 - National Surveys: Countries conduct household surveys asking about consumption, income, and expenditures (food, housing, healthcare, etc.)
- Step 2 - PPP Conversion: The international poverty line ($3.00 in 2021 PPP) is converted to local currency using Purchasing Power Parity rates
- Step 3 - Price Adjustment: The local currency threshold is adjusted to the survey year's prices using the Consumer Price Index (CPI)
- Step 4 - Poverty Count: Households with consumption/income below the threshold are counted as extreme poor
- Step 5 - Aggregation: Country-level data is aggregated to produce regional and global poverty estimates
Data Limitations: Not all countries conduct surveys regularly. The most recent data for some countries may be several years old, requiring statistical projections.
WB
World Bank PIP
Poverty & Inequality Platform
ICP
ICP
2021 PPP data (2024 release)
LIC
Low-Income Countries
National poverty line data
HH
Household Surveys
LSMS, DHS, and national surveys