1. Department of Mechanics, Mathematics and Management, Polytechnic University of Bari, Bari, Italy
2. Mount Royal University, Calgary, AB, Canada
3. WHU—Otto Beisheim School of Management, Vallendar, Germany
4. School of Economics and Management, Free University of Bozen-Bolzano, Bozen/Bolzano, Italy
5. IMD, Lausanne, Switzerland