[1] Department of Pharmaceutical Health Outcomes and Policy, University of Houston, Houston,TX, United States
[2] Department of Economics, Bojnord University, Bojnord, Iran
[3] Department of Computer Science, Utah State University, Logan,UT, United States
[4] Chair of Economic Growth, Structural Change and Trade, University of Greifswald, Greifswald, Germany
[5] Department of Economics, University of Utah, Salt Lake City,UT, United States