We develop a model of international trade with heterogeneous firms and endogenous quality choices. Producing higher quality involves returns to scale, it is intensive in skilled labor and high-quality inputs. Firms' quality choices are interrelated because firms sell their goods to consumers and...

Customs face a difficult tradeoff between, on one side, collecting tariff revenues and preventing smuggling, and on the other side, avoiding creating additional barriers to trade. They also tend to concentrate discretionary power in the hands of officials whose decisions can bear high costs for...