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Joseph Aldy

Associate Professor of Public Policy
Office Address
79 John F. Kennedy St. Ofer Bldg 403
Aldy, Joseph, and William A. Pizer. "Competitiveness Impacts of Climate Change Mitigation Policies." Journal of the Association of Environmental and Resource Economists 2.4 (December 2015): 565-595.


The pollution haven hypothesis suggests that unilateral domestic climate change mitigation policy would impose significant economic costs on carbon-intensive industries, resulting in declining output and increasing net imports. In order to evaluate this hypothesis, we undertake a two-step empirical analysis. First, we use historic energy prices as a proxy for climate change mitigation policy. We estimate how production and net imports change in response to energy prices using a 35-year panel of approximately 450 U.S. manufacturing industries. Second, we take these estimated relationships and use them to simulate the impacts of changes in energy prices resulting from a domestic climate change mitigation policy that effectively imposes a $15 per ton carbon price. We find that energy-intensive manufacturing industries are more likely to experience decreases in production and increases in net imports than less-intensive industries. Our best estimate is that competitiveness effects – measured by the increase in net imports – are as large as 0.8 percent for the most energy-intensive industries and represent no more than about one-sixth of the estimated decrease in production under a $15 per ton carbon price.