United Nations Human Development Index

The Human Development Index (HDI) is a statistical composite index that ranks countries into four tiers of human development based on life expectancy, education, and per capita income indicators. The index was developed by Mahbub ul-Haq and is used by the United Nations Development Programme to measure a country's development. The HDI has three dimensions: Life Expectancy Index, Education Index, and Income Index, which are calculated using specific formulas and then combined to produce the final HDI score. The index does not account for factors such as net wealth per capita or the quality of goods in a country, which can lower the ranking of developed countries.learn more on wikipedia