1. College of Hotel and Tourism, Kyunghee University, 1 Hoegi-dong, Dongdaemun-gu, Seoul, Korea
2. Chair-Research Fellow, Busan Development Institute, Yangjung dong 273-20, Busan Jin-gu, Busan, Korea
3. Department of Agricultural Economics, Texas A&M University, College Station, TX 77843-2124, USA