1. School of Humanities, Social Sciences and Economics, International Hellenic University 57001, Thessaloniki Greece (e-mail: p.galetsi@ihu.edu.gr).
2. School of Humanities, Social Sciences and Economics, International Hellenic University 57001, Thessaloniki Greece (e-mail: k.katsaliaki@ihu.edu.gr).
3. Operations and Supply Chain Management and CenturyLink Endowed Chair in Global Communications and Technology Management, Opus College of Business, University of St. Thomas, Minneapolis, MN 55403 USA (e-mail: skumar@stthomas.edu).