Abstract

Dos Santos and Postel-Vinay [J. Popul. Econ. 16 (2003) 161] argues that emigration helps promote the knowledge stock of the source country and is always beneficial. If individual heterogeneity of the knowledge stock is taken into account, I find the Dos Santos and Postel-Vinay modified model provides a classical brain drain analysis. Emigration is good to the source country only when a sufficient number of emigrants return.