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文章从理论和实证两个角度研究贸易开放对收入不平等的U型影响。首先将技术学习添加到斯托尔伯-萨缪尔森模型中以研究贸易开放的不同效应对收入不平等的影响,发现对发展中国家而言,贸易开放对收入不平等存在“先抑后扬”的U型影响。此外,文章利用我国1978～2007年间省际面板数据进行实证研究,实证结果表明贸易开放和收入不平等之间存在长期的面板协整关系,并且动态最小二乘法的回归表明贸易开放对收入不平等的影响确实是U型的。
The article studies the U-shaped influence of trade openness on income inequality from both theoretical and empirical perspectives. First, technical learning was added to the Storber-Samuelson model to study the effect of the different effects of trade liberalization on income inequality. It was found that for developing countries, trade liberalization had an impact on income inequality After Yang "U-shaped impact. In addition, the article makes use of the inter-provincial panel data from 1978 to 2007 to do the empirical research. The empirical results show that there is a long-term panel cointegration relationship between trade openness and income inequality, and the regression of dynamic least squares shows that trade openness is not equal to income inequality The effect is really U-shaped.