Lorenzo Vai is researcher at the Centro Studi sul Federalismo (CSF) in Turin and the Istituto Affari Internazionali (IAI) in Rome, and adjunct lecturer at the University of Turin. Pier Domenico Tortola is currently research fellow at the University of Milan and the director of EuVisions. He was researcher at the Centro Studi sul Federalismo (CSF) from November 2013 to March 2015. Nicoletta Pirozzi is senior fellow in the European Affairs area and Institutional Relations Coordinator at the Istituto Affari Internazionali (IAI) and adjunct professor at the "Roma Tre" University in Rome.