I study the cause and consequences of the brain drain in over thirty OECD countries. The theoretical model behind it is based on two period life individuals who face the choice of education in the first period and the choice to emigrate in the second. The migration database I use is the latest available and has not been empirically analyzed yet. The data are from the census of 2010/2011 and they are in a rough form; all the constructions and elaborations are my own. I therefore analyze the effect of brain drain on the human capital at home and find that the relationship is not straightforward as the previous literature confirms.