1. Department of Management and Law, Faculty of Economics, University of Rome Tor Vergata, Rome, Italy
2. Faculty of Sciences of Bizerte, University of Carthage, Tunis, Tunisia
3. Department of Business Administration, Faculty of Management, Kharazmi University, Tehran, Iran
4. Department of Engineering and Mathematics, Sheffield Hallam University, Sheffield, UK
5. Science Policy Research Unit, University of Sussex Business School, Brighton, UK