Research on the Impact of International Trade on Income Distribution in China Abstract: In recent years, with the prevalence of trade protectionism and the widening income gap, the impact of international trade on income distribution has become a research hotspot in the field of international trade. On the basis of s ~ s theorem, this paper deeply studies the development of foreign trade, the income distribution of employees between different industries in China and the influence of their differences. Keywords: foreign trade; Income gap; S-S Theorem Since the reform and opening up 30 years ago, China's economic construction and social development have made remarkable achievements, and foreign trade has achieved leap-forward development. At the same time, the income gap between different industries in China has gradually widened. Therefore, the influence of foreign trade development on domestic income distribution has gradually become a topic of concern. I. Overview The research on the influence of international trade on the income distribution of a country's residents originated from the classical trade theory. The first economists who directly linked international trade with domestic income distribution were Stolpa and Samuelson. In 194 19465438, they put forward the Stol # er—Samuelson theorem (S-S theorem for short) based on the H-O model. S-S theorem proves that when a country implements free trade, the reward of the factors intensively used in the production of export products (domestic abundant factors) will increase, while the reward of the factors intensively used in the production of imported products (domestic scarce factors) will decrease. 1 948, Samuelson further proposed that in the long run, under the condition that all factors of production can flow freely, free trade will equalize the prices of goods and factors of production between trading countries (that is, the factor equalization theorem, FPE theorem for short). Since the S-S theorem and FPE theorem were put forward, many economists have done a lot of theoretical analysis and empirical research on the relationship between trade and domestic income distribution. Wood and Lerner believe that trade is the direct cause of the widening income gap in developed countries. But Lawrence, slaughter, Krugman and bhagwati hold different views. They believe that manufactured goods imported from developing countries only account for 2% of the total GDP of OECD countries. In this case, the S-S theorem can hardly work. In the empirical test, Sebastian and Edwards used the latest data of income distribution in 44 countries (including 27 developing countries) published by the World Bank in the 1970s and 1980s. The regression analysis showed that globalization and free trade had little impact on income distribution. Haral Beyer, Patricio Rojas and RodrigoVergara used the cointegration method to analyze the long-term relationship between the salary and openness of skilled workers in Chile. It proves that the expansion of openness measured by foreign trade dependence has aggravated the income inequality in Chile. Raymond Robertson found through empirical research that trade liberalization in Mexico increased the demand for skilled workers, which led to the widening of the wage gap. A Yang Yanjun, School of Management, Fudan University In recent years, some domestic scholars have also begun to study the relationship between trade and income distribution. Zhai Fan and Li analyzed the income distribution effect of trade and tax policies. The results show that trade can improve the efficiency of economic operation and narrow the income gap, and its degree depends on the government's tax policy. Yin Xiangshuo discussed the influence of using comparative advantages and promoting technological progress on domestic income distribution.