[1] Soonchunhyang Univ, Global Business Sch, Unitopia 901,Soonchunhyang Ro 22,Sinchang Myeon, Asan 31538, Chungchungnam D, South Korea
[2] Chonnam Natl Univ, Dept Business Adm, Yongbong Ro 77,Buk Gu, Gwangju 61186, South Korea
[3] Univ Suwon, Dept Business Adm, 810,17 Wauan Gil,Bongdam Eup, Hwaseong Si 18323, Gyeonggi Do, South Korea