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Income inequality and economic growth: A re‐examination of theory and evidence

Mehmet Balcilar, Rangan Gupta, Wei Ma and Philton Makena

Review of Development Economics, 2021, vol. 25, issue 2, 737-757

Abstract: We re‐examine the theoretical and empirical relationship between income inequality and long‐run economic growth in an endogenous growth model with a flat tax on income, distributive conflicts among agents, and median voter dynamics. We show that when government spends tax revenue on the provision of public goods in the form of both production and consumption services, the theoretical relationship between inequality and economic growth is neither strictly positive nor strictly negative, but ambiguous. An empirical evaluation of the theoretical findings is carried out by applying a semi‐parametric model on a sample of 63 countries for the period 1991–2017. Results show that the relationship between income inequality and growth takes the form of an inverted U‐shape in that income inequality initially has a positive impact on growth up to an average Gini coefficient threshold of 35.92, beyond which it negatively impacts on growth.

Date: 2021
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https://doi.org/10.1111/rode.12754

Related works:
Working Paper: Income Inequality and Economic Growth: A Re-Examination of Theory and Evidence (2018)
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