1. HERMES (Higher Education and Research on Mobility Regulation and the Economics of Local Services), Collegio Carlo Alberto , Piazza Arbarello 8, 10122 Torino , Italy
2. Department of Economics and Finance (DEF) , Università Cattolica del Sacro Cuore , Largo A. Gemelli 1, 20123 Milano , Italy
3. Department of Law, Economics and Cultures (DiDEC) , Università dell’Insubria , Via S. Abbondio 12, 22100 Como , Italy
4. Department of Law and Political, Economic and Social Sciences (DIGSPES) , University of Piemonte Orientale , Via Cavour 84, 15121 Alessandria , Italy
5. Department of Economics and Finance (DEF) , Università Cattolica del Sacro Cuore , Largo Francesco Vito 1, 00168 Roma , Italy