By structurally estimating the model, it is possible to quantify the sacrifices made by the first generation of Mexican immigrants for the benefits of future generations. In particular, the estimation results suggest that there is a significant one time loss of human capital of immigrants upon migration, that migrants are positively selected from the ability distribution, and that they transmit substantial human capital to their children. Finally, the model is used to evaluate the effects of social policies designed to reduce the “brain drain” from Mexico to the United States.