研究开放条件下就业保护立法的劳动力市场效应、构建平衡灵活性和稳定性的最优就业保护制度是我国劳动力政策的现实需求，基于法与经济学的角度考察贸易与劳动力市场的动态机制正成为一个创新视角。在Helpman（2010）和Olney（2013）劳动市场规制与贸易开放的模型基础上，本课题运用实验经济学的思想，首先，应用跨国数据检验就业保护立法对贸易比较优势及FDI选址的影响，识别就业保护立法影响贸易开放的作用机制；其次，应用我国企业层面和劳动者层面微观数据分别从两个视角（企业异质性和个体异质性）评估劳动力市场在三个维度（工资、就业及波动）所受到就业保护立法的影响，并进一步检验就业保护立法和贸易开放的交互作用，同时应用倾向分数配对及异质处理效应（PSM-HTE）方法控制内生性问题；最后，基于理论模型和实证结论，构建我国与贸易政策相协调以及兼顾企业灵活性诉求和个体安全性诉求的就业保护制度。

Research on the effects of employment protection legislation (EPL) on the labor market and constructing the optimal employment protection system which balances flexibility and safety in the context of trade liberalization meets China's current needs. Moreover, it is becoming a newly and potential research topic to investigate the linkage between trade and labor market from the perspective of law and economics. Based on the model illustrating the linkage between employment protection legislation and trade which has been developed by Helpman(2010) and Olney(2013), the research project first applies country-sector level data to empirically investigate the effect of employment protection legislation on comparative advantage and location choice of foreign direct investment, which provides insights into the mechanism of EPL affecting trade pattern and FDI. Following that by taking firm heterogeneity and employee heterogeneity into account, the project tests the performance of EPL and together with trade on labor market, that is, wage, employment and work fluctuation using China's firm-level and employee-level data, respectively. For controlling endogeneity problem, this project uses the new developed Propensity Score Matching-Heterogeneous Treatment Effect (PSM-HTE) method. The underlying project aims to construct the optimal employment protection legislation system in the context of trade openness, which coordinates well with trade policy and balance the flexibility and safety appealing to firms and employees respectively.