Economists and legal scholars have known for decades that "economic instruments," including cap-and-trade regimes and effluent taxes, can reduce emissions at lower cost than command-and-control regulations. Yet, the US system of environmental law remains heavily dominated by command-and-control....

Environmental protection and resource conservation depend on the imposition of property rights (broadly defined) because in the absence of some property system - private, common, or public - resource degradation and depletion are inevitable. But there is no universal, first-best property regime...