1. Business Research Unit; ISCTE - Insituto Universitario de Lisboa Avenida das Forças Armadas; 1649-026 Lisboa Portugal
2. Norwich Business School; University of East Anglia Thomas Paine Study Centre, NR4 7TJ - Norwich; Norfolk UK
3. Sapienza University of Rome, Faculty of Medicine and Psychology Via dei Marsi 78-00185; Rome Italy