中文摘要：

金融发展是贸易比较优势的重要源泉，文章将金融发展因素纳入到贸易与收入不平等的分析框架，并基于省际面板数据检验贸易扩张对收入不平等的影响。研究结果表明，进出口贸易确实加剧了中国收入不平等程度，而金融发展对贸易扩张的收入分配效应则起到负向作用，即地区金融发展水平的提高有助于贸易缩小收入差距。然而金融发展的作用尚未充分体现，这是源于中国金融体系具有明显的选择性压制或制度偏向特征。

英文摘要：

Finance is an important source of comparative advantage. The paper introduces financial development into the analytical framework of the relationship between trade openness and domestic income inequality in developing countries. Using China＇ s inter-provincial panel data from 1997 to 2009, the paper examines the impact of trade expansion on income distribution from the perspective of financial development. We find that trade expansion has contributed to the increasing in- equality. Furthermore, financial development has a robustly and significantly negative effect on it. In those provinces which have a higher level of financial development, the effect will be greater.