ABSTRACT. Kahanec et al. identify the main scientific and policy challenges concerning migration in the enlarged EU. Rosenow focuses on the developments that led to the “surprising” emergence of integration policies as a new policy field at the EU level. Sahay holds that host countries have policies that encourage or provide the necessary conditions for brain drain to take place. Kuhn and McAusland introduce differences in intellectual property rights, showing that (a) weak domestic IPRs accentuate the gains from knowledge worker emigration, and (b) if source country IPRs are chosen endogenously, BBD becomes even more likely than in the base case. (pp. 150–156)

JEL: E24, F22, J62