1. Department of Economics and Statistics, University of Udine, Udine, Italy
2. Department of Economics, University of Foggia, Foggia, Italy
3. Department of Political Science, University of Bari Aldo Moro, Bari, Italy
4. Dipartimento di Neuroscienze, Imaging e Scienze Cliniche, University “G. d’Annunzio” of Chieti and Pescara, Chieti, Italy
5. Unioncamere-Si.Camera, Roma, Italy