1. a Department of International Trade , Feng Chia University , 100, WenHwa Rd., Taichung 407 , Taiwan
2. b Department of Industrial Engineering and Management , National Ching-Yi University of Technology , No.57, Sec. 2, Zhongshan Rd., Taiping Dist., Taichung 411 , Taiwan
3. c Department of Finance , Feng Chia University , Taichung , Taiwan