This paper studies a novel explanation for observed productivity differences among firms in the same industry. Competition is allowed to affect labor productivity, so that heterogeneity in competition affects the demand for skilled labor, leading to differences in firm performance. This...

In this paper, we analyze the incentives of an incumbent and an entrant to migrate from an "old" technology to a "new" technology, and discuss how the terms of wholesale access affect this migration. We show that a higher access charge on the legacy network pushes the entrant firm to invest...

We develop a stylized EU-type model of a union consisting of rich, capital-abundant and high productivity countries, and poor, capital-scarce and low productivity countries. We address two main issues: the efficiency of tax competition and the effect of factor mobility on the size of the welfare...

We develop a stylized EU-type model of a union consisting of rich, capital-abundant and high productivity countries, and poor, capital-scarce and low productivity countries. We address two main issues: the efficiency of tax competition and the effect of factor mobility on the size of the welfare...

"Brain gain" what's in the name? Opportunities and challenges of highly skilled immigration -- The historical treatment of skilled immigrants in US : immigration legislation -- Definitions and demographics : highly skilled workers in the United States -- The tipping point of the brain gain : job...