国家重大科学研究计划课题"气候变化下中国区域增长与公平控制"2012CB955803;国家社科基金重点项目"我国反季旅游市场潜力的区域差异与开发策略研究"12AJY008资助.[This study was supported by grants from National Basic Research Program of China 973 Program to LIANG Yi2012CB955803;National Social Science Foundation of China to FENG Xuegang No.12AJY008.]