1. Department of Economics, University of Thrace, 69100 Komotini, Greece
2. School of Business, University of Nicosia, Nicosia 2417, Cyprus
3. School of Social Sciences, Business & Organisation Administration, Hellenic Open University, Par. Aristotelous 18, 26335 Patras, Greece
4. Department of Organization Management, Marketing and Tourism, School of Economics and Management, International Hellenic University, Thessaloniki Campus, 17 Km Thessaloniki-Sindos, 57400 Thessaloniki, Greece