Affiliation: | 1. National Laboratory for Tourism &2. eCommerce of the School of Tourism , Hospitality Management at Temple University, 1810 North 13th Street, Suite 393 , Philadelphia, PA, 19122, USA yeyihelen@temple.edu;4. eCommerce of the School of Tourism , Hospitality Management at Temple University, 1810 North 13th Street, Suite 305 , Philadelphia, PA, 19122, USA |