中文摘要：

理论上，外资经济与居民收入差距之间可能存在非线性关系。运用平滑转移回归模型对外资经济与我国居民收入差距间的关系进行了阈值协整检验，结果表明，外资经济与全国基尼系数之间存在阈值协整关系；市场化水平低于0．668，外资经济扩大我国居民收入差距的作用接近或达到最大；市场化水平上升至0．668，外资经济对我国居民收入差距的效应发生非线性转移；随着市场化进程的推进，2000年左右外资经济对我国居民收入差距的作用发生性质变化，2002—2010年外资经济缩小居民收入差距的作用接近或达到最大。

英文摘要：

Theoretically, there may be a nonlinear relationship between foreign capital economy and resident income gap. By applying the smooth cointegration test of the threshold value over the transition regression model, this paper conducts a relationship between foreign capital economy and resident income gap. The results show that there exits a cointegration relationship of threshold value between foreign capital economy and the national Gini coefficient. When the marketalization level is lower than 0.668, the positive role of foreign capital economy in enlarging the income gap reaches or is close to the maximum; when the marketlization level rises to 0.668, the effect of foreign capital economy on the income gap would have a nonlinear transfer. With the development of the marketalization process, the role of foreign capital economy played on China＇s income gap changed its nature around 2000; during the period of 2002-2010, the role of foreign capital economy in narrowing the income gap may be close to or reach the maximum.