1. Department of Retailing and Tourism Management, College of Agriculture, Food & Environment, University of Kentucky, Lexington, KY, USA
2. Rosen College of Hospitality Management, University of Central Florida, Orlando, FL, USA
3. School of Sport, Tourism and Hospitality Management, Temple University, Philadelphia, PA, USA
4. Professor Emeritus of Tourism, Haskayne School of Business, University of Calgary, Canada