Isabelle Brocas is Assistant Professor at the University of Southern California, and Assistant Professor (on leave) at the Free University of Brussels. She is also a research affiliate at CEPR, a research advisor at EERC (Russia), and co-editor of the 'Annals of Marie Curie Fellows Association'. Juan D. Carrillo is Associate Professor at the University of Southern California, and is currently on leave from the Free University of Brussels. He is also a research affiliate at CEPR, a research advisor at EERC (Russia), and Associate Editor of the Spanish Economic Review.