1. Department of Economics, Pusan National University, Busan 46241, Republic of Korea
2. Baotou Teachers’ College, Inner Mongolia University of Science and Technology, Baotou 014030, Inner Mongolia, China
3. Department of Business Administration, Pusan National University, Busan 46241, Republic of Korea
4. Department of Business Administration, Jeonju University, Jeonju 55069, Republic of Korea