1. Sorbonne Universite , 15-21 Rue de l’École de Médecine, 75006 Paris, France . e-mail: jean-michel.dalle@sorbonne-universite.fr
2. Department of Economics, Stanford University , Stanford, CA 94305, USA . e-mail: pad@stanford.edu
3. Department of Management, Universita Ca' Foscari , San Giobbe, Cannaregio 873, Venezia 30121, Italy . e-mail: francesco.rullani.@unive.it
4. Department of Economics and Law, University of Cassino and Southern Lazio , Viale dell’Università, 03043 Cassino FR, Lazio, Italy . e-mail: francesco.bolici@eco.unicas.it