1. School of Economics and Finance, Xi’an Jiaotong University, Xi’an, Shaanxi, P. R. China
2. College of Business, Al Ain University, Al Ain, United Arab Emirates
3. School of Accounting, Economics and Financial Management, Faculty of Business and Law, University of Portsmouth, UK; Consultant in Economics and Finance, Riyadh, Saudi Arabia
4. Department of Economics, Faculty of Economics and Administrative Sciences, Faculty of Tourism, Anadolu University, Eskişehir, Turkey
5. Dedman College of Hospitality, Florida State University, Tallahassee, FL, USA