Two developed countries have market economies with similar gross domestic products. however, one is ranked lower than the other on the united nations human development index. what might contribute to this low ranking?

Differences in life expectancy and education indexes, as well as differences on national income per capita.

Explanation:

The Human Development Index is a composite index aimed to measure people's quality of life accross countries based not only on economic growth, but taking into account other key dimensions of human development. HDI offers a more complete analysis than those based solely on GDP.

HDI is the geometric mean of normalized indices of three dimensions: 1) health (measured by life expectancy at birth), 2) education (measured by mean of years of schoooling for adults) and 3) standard of living (measured by gross national income per capita)