Human Development Index

The Human Development Index (HDI) 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. A country scores a higher level of HDI when the lifespan is higher, the education level is higher, and the gross national income GNI (PPP) per capita is higher. It was developed by Pakistani economist Mahbub ul-Haq and was further used to measure a country's development by the United Nations Development Programme (UNDP)'s Human Development Report Office.

Extends: [Human Development Index](https://wikipedia.org.ai/Human Development Index), [Development economics](https://wikipedia.org.ai/Development economics), [Environmental economics](https://wikipedia.org.ai/Environmental economics), [International rankings](https://wikipedia.org.ai/International rankings), [Science and technology in Pakistan](https://wikipedia.org.ai/Science and technology in Pakistan)