1. Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, Beijing 100091, China
2. School of Economics and Management, Tsinghua University, Beijing 100084, China
3. School of Economics and Management, Beijing University of Technology, Beijing 100124, China
4. Faculty of Forestry, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada
5. Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China