On the Robustness of Brain Gain Estimates

Recent theoretical studies suggest that migration prospects can raise the expected return to human capital and thus foster education investment at home or, in other words, induce a brain gain. In a recent paper (Beine, Docquier and Rapoport, Economic Journal, 2008) we used the Docquier and Marfouk (2006) data set on emigration rates by education level to examine the impact of brain drain migration on gross (pre-migration) human capital formation in developing countries. We found a positive e¤ect of skilled migration prospects on human capital growth in a cross-section of 127 developing countries, with an elasticity of about 5 percent. In this paper we assess the robustness of our results to the use of alternative brain drain measures, de nitions of human capital, and functional forms. We nd that the results hold using the Beine et al. (2007) alternative brain drain measures controlling for whether migrants acquired their skills in the home or in the host country. We also regress other indicators of human capital investment on skilled migration rates and nd a positive e¤ect on youth literacy while the e¤ect on school enrolment depends on the exact speci cation chosen.