1. Department of Economics, Universitas Terbuka, Tangerang Selatan 15418, Indonesia
2. Department of Economics, Universitas Negeri Semarang, Semarang 50229, Indonesia
3. Master of Management, Universitas Terbuka, Tangerang Selatan 15418, Indonesia
4. Postgraduate School, Airlangga University, Surabaya 60115, Indonesia