Affiliation: | 1. Department of Insurance and Finance, National Taichung University of Science and Technology, Taichung 404, Taiwan, ROC;2. Department of Information Management, National Taichung University of Science and Technology, 129 Sec. 3, Sanmin Rd., Taichung 404, Taiwan, ROC;3. Department of Finance, National Chung Hsing University, Taichung 402, Taiwan, ROC;1. Department of Mathematics, University of Aegean, Karlovasi 83200, Greece;2. Department of Electrical Engineering, Computer Engineering and Informatics, Cyprus University of Technology, Limassol 3036, Cyprus |