The
Human Development Index (
HDI) is a composite statistic of
life expectancy,
education, and
income per capita indicators, which are used to rank countries into four tiers of
human development. A country scores higher HDI when the life expectancy at birth is longer, the education period is longer, and the income per capita is higher. The HDI was developed by Pakistani economist
Mahbub ul Haq, often framed in terms of whether people are able to "be" and "do" desirable things in their life, and was published by the
United Nations Development Programme.