David A. Weisbach

Regulatory trading systems, such as the SO2 cap-and-trade system, are ubiquitous in environmental and natural resources law. In addition to cap-and-trade systems for pollutants such as SO2, NOx, and CO2, environmental and natural resources law uses trading in areas such as endangered species, water quality, wetlands, vehicle mileage, and forestry and farming practices. Trading, however, is rarely used as a regulatory approach in other areas of law. This Article seeks to identify the reasons for this dichotomy. To understand the dichotomy, the Article examines the uses of trading in environmental and natural resources law, where it has been successful, and where problems have arisen, including hot spots problems, environmental justice problems, measurement problems, and moral problems with the use of markets. It then considers the possibility of trading in six nonenvironmental areas of law to see whether trading can be helpful, and if not, why not.