Dynamic Fairness: Mobility, Inequality, and the Distribution of Prospects*
研究社会公平的动态性质，发现公平由不平等和交换流动性共同决定，不平等降低公平而流动性提升公平，且不同组合可达到相同公平程度，有助于比较不同经济环境的机会分布。
Abstract A society is fairer when the income of the family into which individuals are born, over which they have no control, plays a smaller role in determining their prospects. We examine the nature of dynamic fairness based on the distribution of prospects using a generalized concentration curve. We find that dynamic fairness is jointly determined by inequality and exchange mobility, with inequality reducing fairness and exchange mobility enhancing it. Moreover, any degree of dynamic fairness can be obtained from one of the many pairs of inequality and exchange mobility. Our results can help compare different economic environments through the distribution of their economic opportunities.