Theoretical and empirical study of the effect of international trade on income

对于国际贸易对员工工资的影响，我使用日本制造业企业90年代至21世纪初的数据和最终半成品的进口数据进行估算。研究发现，中间产品进口的增加降低了高中毕业生男性员工的工资，但提高了高中毕业生女性员工的工资。对于国际投资相关的无形资产移植效应，研究发现美国、英国、瑞典和芬兰的无形资产具有较高的盈利能力，接收国的工人也通过接收外国无形资产获得了提高劳动生产率的利益。

As for the effect of international trade on employees' wage, I estimate it by using Japanese manufacturing firm data from the 1990s to the 2000s and the import data of final and intermediate goods. It is found that the increase of intermediate goods import decreases the wage of high-school-graduate male employees but increased the wage of high-school-graduate female employees. As for the effect of intangible asset transplantation associated with international investment, it is found that intangible asset in U.S., U.K., Sweden, and Finland has a high profitability, and that the workers in receiving countries also have a benefit of increasing labor productivity by accepting foreign intangible asset.