Which data sources are used for HDI computation?

Life expectancy at birth is provided by the UN Population Division in the UN Department of Economic and Social Affairs (UNDESA); mean years of schooling (MYS) is based on UNESCO Institute for Statistics (UIS) educational attainment data, for countries for which UIS data are not available, Barro and Lee (2018) estimates and projections were used; expected years of schooling (EYS) is provided by UIS; and GNI per capita (in 2017 $PPP) by the World Bank and the International Monetary Fund. For several countries, mean years of schooling and expected years of schooling are estimated from nationally representative household surveys, and for some countries GNI was obtained from the UN Statistical Division’s database – National Accounts Main Aggregates Database.