1. Department of Finance, Chung Hua University, No. 707, Sec. 2, WuFu Rd., Hsinchu 300, Taiwan
2. Institute of Finance, National Chiao Tung University, No. 1001 TaHsueh Rd., Hsinchu 300, Taiwan
3. Department of Finance, National Chengchi University, No. 64, Sec. 2, ZhiNan Rd., Wenshan District, Taipei 11605, Taiwan