1. Benjamin M. Statler College of Engineering and Mineral Resources, Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, WV, USA
2. John Chambers College of Business & Economics, Department of Economics, West Virginia University, Morgantown, WV, USA
3. School of Software, Shandong University, Jinan, Shandong, China
4. College of Liberal Arts & Social Sciences, Department of Economics, University of North Texas, Denton, TX, USA