Income inequality and economic growth

We develop an analytical framework to investigate some plausible channels that income inequality affects economic growth. Our empirical study concludes that income inequality has significant negative effect on the rate of GDP growth. Among the channels suggested by recent literature, we find that the most important one is the transfer channel while the least important one is the human capital channel. However, the direct impact of income inequality on the rate of productivity growth accounts for more than 55 percent of its overall total effect. This indicates that the effects of income inequality on economic growth are much more complicated than what we have perceived and modeled.