1. Department of Law and Economics, Mediterranean University of Reggio Calabria, Via dei Bianchi, 2, I—89127 Reggio Calabria (RC), Calabria, Italy,
2. Department of Political Science, University of Genoa, Piazzale E. Brignole, 3A, I—16125 Genoa (GE), Italy
3. Department of Management, Polytechnic University of Marche, Piazza Martelli 8, I—60121, Ancona (AN), Italy,
4. Department of Economics and Management, University of Pisa, Via Cosimo Ridolfi, 10, I—56124, Pisa (PI), Italy,