Theory suggests that groups historically subject to discrimination, such as Jews, could exhibit traditionally high investment in education because discrimination spurred exit facilitated by human capital. Theory moreover suggests that if exit is uncertain, it could induce investment in skill...

The emigration of highly skilled workers can in theory lower social welfare in the migrant-sending country. If such workers produce a good whose consumption conveys a positive externality - such as nurses and doctors in a very poor country - the loss can be greater, and welfare can even decline...