Based on a theoretical model featuring heterogeneous retailers that may source globally and operate as chains, we derive a number of hypotheses that link trade integration to retail firm performance and to the structure of retail markets. We empirically test these predictions using Danish...

Guest workers on visas in the United States may be unable to quit bad employers due to barriers to mobility and a lack of labor market competition. Using H-1B, H-2A, and H-2B program data, we calculate the concentration of employers in geographically defined labor markets within occupations. We...