I develop a dynamic version of the competitive search model with adverse selection in Guerrieri, Shimer and Wright (2010). My model allows for an analysis of the effects of firm learning on labor market efficiency in the presence of search frictions. I find that firm learning increases relative...

High-performance firms typically have two features in common: i) they produce in more than one country and ii) they produce more than one product. In this paper, we analyze the internationalization strategies of multi-product firms at the product-level. We find that the most productive firms...

High-performance firms typically have two features in common: i) they produce in more than one country and ii) they produce more than one product. In this paper, we analyze the internationalization strategies of multi-product firms at the product-level. We find that the most productive firms...

We analyze the effect of workforce composition by birthplace on workers' wages. In our model, each worker's productivity may depend on whether co-workers are of the same or of a different birthplace. Wages depend both on the relative size of workers' groups as well as on the production structure...

We develop a model of directed technological change, frictional unemployment and migration to examine the effects of a change in skill endowments on wages, employment rates and emigration rates of skilled and unskilled workers. We find that, depending on the elasticity of substitution between...

This paper investigates the eectiveness of immigration control policies when the duration of stay of illegal immigrants is endogenous because they may return home voluntarily. It shows that return intentions matter. First, we nd that spending on border enforcement can potentially increase the...

We determine workforce composition and wages in rms in the presence of productivity spill-overs between co-workers. In equilibrium, workers' wages depend on the production struc- ture of rms, own group size, and aggregate workforce composition in the rm. We estimate the wage eects of workforce...

Illegal immigration is a major policy challenge in Europe, in particular in countries on the external border of the EU such as Italy or Spain. However, there are likely to be important effects on the rest of the EU, too, depending on the policies against illegal immigration in border countries....

We determine workforce composition and wages in firms in the presence of productivity spill-overs between co-workers. In equilibrium, workers’ wages depend on the production structure of firms, own group size, and aggregate workforce composition in the firm. We estimate the wage effects of...