Does better access to skilled workers reduce firms' willingness to provide general skills training to unskilled workers? We analyze how the gradual opening of the Swiss labor market to workers from the European Union affected the number of apprenticeship positions that firms provide. We exploit...

This paper explores the impact of undocumented as opposed to documented immigration in a model featuring search frictions and non-random hiring that is consistent with novel empirical evidence presented. In this framework, undocumented immigrants' wages are the lowest of all workers due to their...

We analyze the effects of increased immigration of foreign workers on the unionisation rates of native workers in Austrian firms over the period 2002–2012. Our results suggest that lower union density of natives' in firms with more foreign workers is driven not by natives leaving unions, but...