1. Oklahoma State University Stillwater, 7618, School of Entrepreneurship, 424 Business Building, Stillwater, Oklahoma, United States, 74078-1010
2. Ludwig von Mises Institute, 518 West Magnolia Avenue, 518 West Magnolia Avenue, Auburn, Alabama, United States, 36832;
3. University of Nevada, Reno, Managerial Sciences, 1664 N. Virginia Street, Reno, Nevada, United States, 89557, ;