1. Bongsuk Sung, Department of International Business Management, Woosong University, 186 Jayang-dong, Dong-gu, Daejeon, 34518, Republic of Korea.
2. Ki-Kwan Yoon, Department of International Trade, College of Economics and Management, Chungnam National University, 99 Daehak-ro Yuseong-gu, Daejeon, 34134, Republic of Korea.
3. Seunghun Yu (corresponding author), Department of International Business Management, Woosong University, 186 Jayang-dong, Dong-gu, Daejeon, 34518, Republic of Korea.