5Hart, Oliver,Shleifer, Andrei &Vishny, Robert W, 1997, "The Proper Scope of Government: Theory and an Application to Prisons"Quarterly Journal of Economics 112, (4), 1127-61.
6Hartman, R, 1976, "The Harvesting Decision When a Standing Forest Has Value", Economic Inquiry, 14,52-8.
7Holmstrom, Bengt, and Milgrom, Paul, 1991, "Multitask Principal-Agent Analyses: Incentive Contract, Asset Ownership, and Job Design",Journal of Law, Economics and Orgination , Vol7, Special Issue, 24-52.
8Rozelle, Scott, Jikun Huang, Vinee Benziger, 1997, Forest Exploitation and Protection in Reform China: Assessing the Impact of Policy,Tenure, and Economic Growth.
9Xu, J , E Katsigris and T A White, 2001, Implementing the Natural Forest Protection Program and the Sloping Land Conversion Program,China Forestry Publishing House, Beijing.
