We use recent immigration data from 195 countries and propose an index of population diversity based on people … uncorrelated with ethnic, linguistic or genetic diversity. Our main result is that the diversity of skilled immigration relates … gravity model to predict the share and diversity of immigration based on exogenous bilateral variables. The results are robust …

immigration due to its apparently unbearable social and political costs. However these costs are never measured and made … comparable across countries. In this paper we first discuss theoretically how tradable immigration quotas (TIQs) can reveal … information on such costs and, once coupled with a matching mechanism taking into account migrants’ preferences, generate …