What is a human development index HDI
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The Human Development Index (HDI) is a composite statistic used to rank countries based on their level of human development. It measures three key dimensions of human development: health (life expectancy at birth), education (average years of schooling and expected years of schooling), and standard of living (gross national income per capita). The HDI provides a more comprehensive picture of a country's development than simple economic indicators such as GDP per capita. Countries are ranked on a scale from 0 to 1, with a higher value indicating a higher level of human development.