Regulation of nonpoint source pollution often relies in one way or another on policy instruments based on ambient indicators. For well-known reasons, enforcement of ambient-based policies is, at best, limited. If no individual choices or actions are observed, than ambient-based regulation might...

When a nonpoint source pollution process involves many polluters, each taking his own contribution to aggregate pollution to be negligible, ambient-based policies become ineffective due to lack of strategic interactions between dischargers. We offer a regulation mechanism for this case. The...

Sustainability standards for biofuel production calculated via life cycle accounting (LCA) require a certain reduction in greenhouse gas (GHG) emissions relative to gasoline. Recently it has been shown that LCA gives biased results and should be extended to incorporate indirect land use change...

Biofuel greenhouse gas (GHG)-reduction standards calculated via life-cycle assessment are shown to be biased, even when indirect land-use change is included, because they are based on physical GHG emissions and uptakes and on simple aggregates of balances. We offer a GHG-reduction standard for...