1. Department of Accounting, Finance and Economics, Griffith University, Nathan 4111, Australia
2. Department of Economics, Ahmadu Bello University, Zaria 810107, Nigeria
3. Department of Economics, Ibn Haldun University, Başakşehir 34480, Turkey
4. College of Islamic Studies, Hamad Bin Khalifa University, Ar-Rayyan 34110, Qatar