This paper identifies productivity gains from trade by studying the manipulation behavior of firms in response to regulatory policies on international trade in China. Bunching estimates show that participation in international trade increases firm productivity. The productivity gains increase over time, indicating dynamic learning from trading. Further exploration shows no effects on R&D investment, product rationalization, and markup. Young firms and nonstate-owned firms (non-SOEs) gain more from participating in trade. Workers share productivity gains through increased wages but not from increased employment.

Most of the economic analyses of the overseas Chinese network focus on trade and investment flows at the country level. In this paper, we analyze the effects of the ethnic Chinese network at the firm level. Contrary to the conventional wisdom, we find that ethnic Chinese FDI firms in China in fact underperform nonethnic Chinese FDI firms. We also find that the performance of ethnic Chinese firms deteriorates over time. We present evidence consistent with the hypothesis that ethnic Chinese firms underinvest in those firm attributes that may contribute to long-term performance, such as human capital and technology. Our findings raise both empirical and normative implications of ethnic ties.

Since the introduction of the one-child policy in China in 1979, many more boys than girls have been born, foreshadowing a sizable bride shortage. What do young men unable to find wives do? This paper focuses on criminality, an asocial activity that has seen a marked rise since the mid-1990s. Exploiting province-year level variation, we find an elasticity of crime with respect to the sex ratio of 16- to 25-year-olds of 3.4, suggesting that male sex ratios can account for one-seventh of the rise in crime. We hypothesize that adverse marriage market conditions drive this association.