This research was sponsored in part by the Beijer International Institute of Ecological Economics, The Royal Swedish Academy of Sciences, Stockholm, Sweden, with support from the Worid Environment and Resources Program of the John D. and Catherine T. MacArthur Foundation and the World Bank. The research was conducted as part of the research program Property Rights and the Performance of Natural Resource Systems. The research was also sponsored by the Rutgers University Grants program, the National Science Foundation, the National Sea Grant College Program, and the New Jersey Agricultural Experiment Station.