1. Scientific Research Department, University of Technology and Applied Sciences, Salalah, Oman
2. Faculty of Tourism and Hotels, Fayoum University, Fayoum, Egypt
3. Amity Institute of Travel and Tourism, Amity University, Kolkata, India
4. Department of Economics, University of Molise, Campobasso, Italy
5. Business Research Unit, ISCTE Instituto Universitário de Lisboa, Lisboa, Portugal
6. Centre of Applied Research in Management and Economics (CARME), School of Technology and Management (ESTG), Polytechnic of Leiria, Leiria, Portugal