Income Inequality and Population Health in Sub-Saharan Africa: A Test of Income Inequality-Health Hypothesis
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Abstract
Existing studies have shown that income inequality remains a core determinant of population health. These findings are in line with the Income Inequality-Health Hypothesis (IIHH). However, this assertion remains unclear for Sub-Saharan Africa (SSA), despite the rising trend of income disparity in the region and the vastness of the studies that tested the validity of the IIHH. This inferential study, therefore, examines the effect of income inequality on health for 31 Sub-Saharan African countries from 1995 to 2015 using life expectancy at birth, infant mortality rate, and under-five mortality rate as indicators of population health, as well as the Gini index as a measurement of income inequality. The study employed the Generalized Method of Moments (GMM). We infer that income inequality contributes significantly to poor population health in Sub-Saharan Africa, thereby affirming the validity of the Income Inequality-Health Hypothesis for the region.
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