1. Department of Foreign Languages & Societal Culture, Faculty of Business & Finance, Transit College Sierra Leone, Freetown 00232, Sierra Leone
2. Department of Economics and Commerce, Fourah Bay College, Freetown 00232, Sierra Leone
3. School of Economics and Management, Dalian University of Technology, Dalian 116024, China
4. LNU-MSU College of International Business, Liaoning Normal University, Dalian 116024, China
5. School of Economics and Management, University of Science and Technology, Beijing 100083, China