1. Exodus & Flying Education, Seoul 05675, Republic of Korea
2. School of Hospitality & Tourism Management, Purdue University, West Lafayette, IN 47907, USA
3. Department of Family Consumer Science, Minnesota State University, 102 Wiecking Center, Mankato, MN 56001, USA
4. Department of Financial Planning, Housing and Consumer Economics, University of Georgia, 305 Sanford Drive, Athens, GA 30602, USA