The Gender Development Index (GDI) is a statistical composite index of life expectancy, education (mean years of schooling completed and expected years of schooling upon entering the education system), and per capita income indicators, which is used to rank countries into four tiers of human development. It is part of the Human Development Index (HDI),
GDI countries are grouped into five groups based on the absolute deviation from gender parity in GDI values, from 1 (closest to gender parity) to 5 (furthest from gender parity). This means that grouping takes equally into consideration gender gaps favoring males, as well as those favoring females.
The World Economic Forum’s Global Gender Gap Index (GGGI) annually benchmarks the current state and evolution of gender parity across four key dimensions (Economic Participation and Opportunity, Educational Attainment, Health and Survival, and Political Empowerment).
GGGI scores range from 0.000 (largest gap) to 1.000 (smallest gap).
Income rates are displayed in International Dollars (INT$) at Purchasing Power Parity (PPP).
International Dollars (INT) is a theoretical unit of currency used to make country-to-country comparisons easier.
Purchasing Power Parity (PPP) is a conversion factor that compensates for differences in the cost of living from one country to another, making country-to-country comparisons more accurate.
PPP rates are revised annually. For example, 2021 PPP rates would differ at least slightly from 2017 PPP rates because the cost of goods in various countries will have evolved from 2017 to 2021.