Why is Pollution from U.S. Manufacturing Declining? The Roles of Environmental Regulation, Productivity, and Trade∗

نویسنده

  • Joseph S. Shapiro
چکیده

Between 1990 and 2008, air pollution emissions from U.S. manufacturing fell by 60 percent despite a substantial increase in manufacturing output. We show that these emissions reductions are primarily driven by within-product changes in emissions intensity rather than changes in output or in the composition of products produced. We then develop and estimate a quantitative model linking trade with the environment to better understand the economic forces driving these changes. Our estimates suggest that the implicit pollution tax that manufacturers face doubled between 1990 and 2008. These changes in environmental regulation, rather than changes in productivity and trade, account for most of the emissions reductions. JEL: F18, F64, H23, Q56 ∗We thank Joe Altonji, Costas Arkolakis, Randy Becker, Jared Carbone, Brian Copeland, Arnaud Costinot, John Deutch, Sharat Ganapati, Michael Greenstone, Sam Kortum, Arik Levinson, Bill Nordhaus, Noam Yuchtman, and numerous seminar participants for useful comments and discussions. We also thank Adrian Fernandez, Vivek Sampathkumar, David Silver, and Yusuf Mercan for excellent research assistance. The authors acknowledge support from an NSF and Department of Energy grant on the Economics of Energy Markets, Shapiro acknowledges additional support from the Yale MacMillan Center, the Yale Program on Applied Economics and Policy Research, and a Weyerhaeuser Research Grant from the Yale Center for Business and the Environment, and Walker acknowledges additional support from the Robert Wood Johnson Foundation and the UC office of the President through the University of California Center for Energy and Environmental Economics. All results have been reviewed by the U.S. Census Bureau to ensure that no confidential information is disclosed.

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تاریخ انتشار 2017