During the last few decades the world has experienced an unprecedented level of cross-border migration. While this has generated significant socio-economic gains for host countries, as well as sometimes for the countries of origin, the costs and benefits involved are unevenly distributed....

We compare a set of econometric studies that measure the effect of net internal migration in neoclassical models of long-run real income convergence and derive 67 comparable effect sizes. The precision-weighted estimate of beta convergence is about 2.7%. An increase in the net migration rate of...