This Paper addresses the question: why and where do immigrants cluster? We examine the relative importance and interaction of two alternative explanations of immigrant clustering: (1) network externalities and (2) herd behavior. We advance the theory by presenting a framework encompassing both...

Using a large new data set, we analyse the labour market performance of Portuguese workers in Germany. While previous work compares wages and characteristics of migrants only to those of natives, we match the data also with an equivalent survey from the sending country. We find that Portuguese...

Empirical studies in the migration literature have shown that migration enclaves (networks) negatively affect the language proficiency of migrants. These studies, however, ignore the choice of location as a function of language skills. Using data on Mexican migration to the US, we show that...