中文摘要：

虽然收入流动性在收入分配研究领域正在逐渐升温,但收入流动性对收入不平等的影响这一关键问题的研究不足。文章推导了Gini系数在绝对收入流动性矩阵中对应的表达式,分析了收入流动性矩阵对不平等程度的作用途径。并利用1998年-2002年的收入面板数据验证了该理论分析。实证分析表明,由于向收入高低两端流动的力量增长较快并在势头上超过了同样增长的向中等收入水平流动的力量,整体的收入不平等程度恶化了。

英文摘要：

Although income mobility is getting more popular in the research field of income distribution,few empirical or theoretical work has been studied about the effects of income mobility on income inequality.In this paper,an expression of Gini index is derived from the absolute income mobility matrix based on an analysis of their definitions,by which we get the idea that income dynamics can improve the income inequality.All these theoretical analysis are tested with the personal income data from the period of 1998-2002.Since the flows to the higher and lower income levels have exceeded that to the middle income level,overall income inequality deteriorates.