In this study, the influence of economic growth on income disparities in 29
sub-Saharan African (SSA) countries is investigated for the period
2005-2015. The primary objective of the study is to empirically test
Kuznets? hypothesis, which holds that there is an inverted U-shaped
relationship between economic growth and income inequality. The study
examined this relationship using four proxies for income inequality: the
composite inequality index, the Atkinson index, the Gini coefficient, and
the Palma ratio. Using a modified version of a difference generalised method
of moments (GMM) estimation technique, it was found that regardless of the
proxy used to measure income inequality, there is a consistently significant
negative relationship between income per capita (y) and income inequality in
the countries under study. A consistent positive relationship was also found
between the square of income per capita (y2) and income inequality across
all the proxies used in the study. The study found that the relationship
between economic growth and income inequality follows a U-curve. The result
suggests that while economic growth initially lowers income inequality,
inequality eventually rises in tandem with growth. This suggests that the
bulk of the studied economies in the SSA region are situated on the downward
portion of the U-curve. The policy implications are discussed.