1. Department of Economics, Management, and Quantitative Methods, University of Milan, Via Conservatorio 7, Milan 20122, Italy. e-mail: mario.benassi@unimi.it
2. Department of Management and Production Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, Turin 10129, Italy. e-mail: elena.grinza@polito.it; laura.rondi@polito.it
3. European Commission, Joint Research Centre (JRC), Directorate B. Growth & Innovation, Unit B.7—Knowledge for Finance, Innovation & Growth, Edificio Expo, Calle Inca Garcilaso, 3, Sevilla 41092, Spain. e-mail: francesco.rentocchini@ec.europa.eu