Academic basis of our approach: The methodology is broadly similar to the approach outlined in the following academic paper in Nature.
Main input sources include:
For each type of “gap” we apply a unique and tailored approach. Any informational gaps in distributional data (sources from Povcal, UNU-WIDER, and Poverty Equity) is imputed by finding countries that are similar along the dimensions of GDP, age structure, sectoral employment and education structure.
Twice per year, once in November and once in May. These updates are aligned with the biannual release of the World Economic Outlook (WEO) by the International Monetary Fund (IMF). Throughout the year we update parts of the data as updates become available.
It varies from update to update, and country to country.