Education, redistribution, and the threat of brain drain

"This paper analyzes the relationship between brain drain, human capital accumulation and individual net incomes in the presence of a redistributional tax policy, credit market constraints, administrative costs of tax collection, and lack of government commitment. We characterize how decreasing migration costs for skilled workers affect the time-consistent policies of a government that wants to shift resources from skilled to unskilled workers. In our main result we show that a decline in migration costs is Pareto improving when migration costs are high, but have ambiguous effects when these costs are low. Moreover, mobility costs and human capital accumulation are positively correlated"--National Bureau of Economic Research web site.