Alberta Andreotti is Research Fellow in Economic Sociology at the Department of Sociology at the University of Milan-Bicocca and Associate member of the “Cities Are Back in Town” research group, based at Sciences Po, Paris. Patrick Le Galès is CNRS Research Professor of Politics and Sociology at Sciences Po Paris, Centre d”études Européennes and Co-Chair of the “Cities Are Back in Town” research group. Francisco Javier Moreno Fuentes is Research Fellow at the Institute of Public Goods and Policies (IPP-CSIC).