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

关于国际贸易对劳动者工资的影响，使用20世纪90年代至21世纪初的日本制造业企业数据以及最终产品和中间产品的进口数据进行了推算。研究发现，中间产品进口的增加降低了高中毕业男性员工的工资，但增加了高中毕业女性员工的工资。对于国际投资中无形资产移植的影响，本文发现，美国的无形资产，英国，瑞典、芬兰等国的无形资产具有较高的利润率，接受国的劳动者也可以通过接受外国无形资产来提高劳动生产率。

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.