In this paper, we evaluate the influence of two environmental policy levers on emissions in the metal-finishing industry: a voluntary program--the Strategic Goals Program (SGP)--and the threat of formal regulation. While voluntary approaches are increasingly utilized as policy tools, the...

This paper argues that an increased application of quasi-experimental and experimental techniques will improve understanding about core environmental economics questions. This argument is supported by a review of the limitations of associational evidence in assessing causal hypotheses. The paper...