1. European Commission, JRC-Seville, Seville, Spain
2. GRIPICO and ICAE, Complutense University of Madrid, Madrid, Spain
3. Solvay Brussels School of Economics and Management, Université Libre de Bruxelles, Bruxelles, Belgium
4. Department of Economics, Management and Quantitative Methods (DEMM), University of Milan, Milan, Italy
5. Department of Strategy and Management, Norwegian School of Economics, Bergen, Norway