1. Department of Economics and Finance, Southern Illinois University Edwardsville, Edwardsville, Illinois, USA
2. International Institute for Financial Studies, Jiangxi University of Finance and Economies, Nanchang, Jiangxi Province, China
3. School of Business, University of Dundee, Dundee, United Kingdom
4. School of Economics, University of Hyderabad, Telangana, India
5. Department of Economics, Usmanu Danfodiyo University, Sokoto, Nigeria