First Author:   Alessandro Piergallini University of Rome Tor Vergata alessandro.piergallini@uniroma2.it   Department of Economics and Finance, University of Rome Tor Vergata, Via Columbia 2 Rome, 00133, Italy       Second Author: Paolo Canofari Polytechnic University of Marche p.canofari@staff.univpm.it   Department of Economics, Polytechnic University of Marche, Piazzale Martelli 8 Ancona, 60121, Italy       Third Author: Giovanni Piersanti University of Teramo gpiersanti@unite.it   Department of Political Science, University of Teramo, Via Renato Balzarini 1 Teramo, 64100, Italy