Heterogeneous firms and informality: the effects of trade liberalization on labour markets
研究贸易自由化如何通过异质性企业模型影响非正规就业、工资不平等和福利，发现非正规就业必然减少，但对总就业、工资不平等和福利的影响因国家而异。
The informal sector is often seen as a way for firms to evade regulation. In this paper, I therefore investigate the role of the informal sector in the impact of trade liberalization on employment, wage inequality and welfare in a model of trade with heterogeneous firms and endogenous wage dispersion. The findings suggest that trade liberalization reduces informal employment unambiguously. Contrary to the extant literature, however, its impact on total salaried employment, wage inequality and welfare is country-specific.