Affiliation: | a Foundation for Corporate Collaboration, Sungkyunkwan University, 300 Cheoncheon-Dong, Jangan-gu, Suwon, Gyeonggi-do 440-746, Republic of Korea b Department of International Trade, Inha University, 253 Yonghyun-dong, Nam-gu, Incheon, 402-751, Republic of Korea c Jungseok Research Institute of International Logistics and Trade, Inha University, Nam-gu Incheon, Republic of Korea d Kwangwoon University, 447-1 Wolgye-dong, Nowon-gu, Seoul, Incheon, Republic of Korea |