The NOx State Implementation Plan Call was designed to facilitate cost effective reductions of nitrogen oxides emissions from large stationary sources (primarily electricity generators) through the introduction of an emissions trading program. I investigate the relationship between economic...

The 1990 Clean Air Act Amendments stipulated gasoline content requirements for metropolitan areas with air pollution levels above predetermined federal thresholds. The legislation led to exogenous changes in the type of gasoline required for sale across U.S. metropolitan areas. This paper uses a...