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U.S. Trade in Toxics: The Case of Chlorodifluoromethane (HCFC-22)


  • Randy Becker
  • John Tang


This paper explores whether environmental regulation affects where pollution-intensive goods are produced. Here we examine chlorodifluoromethane (HCFC-22), a chemical designated as toxic in 1994 by the U.S. Environmental Protection Agency’s Toxics Release Inventory (TRI). Trends show a decline in the number of domestic producers of this chemical, a decline in the number of manufacturing facilities using it, and an increase in the number (and share) of facilities claiming to import it. Transaction-level trade data show an increase in the import of HCFC-22 imports since its TRI listing – an increase that is faster than that of all non-TRI listed chemicals. This is suggestive of a pollution haven effect. Meanwhile, we find that the vast majority of U.S. imports of HCFC-22 come from OECD countries. However, an increase in the share of imports from non-OECD countries since the chemical’s listing suggests a shift of production to countries with more lax environmental standards. While the findings here are suggestive of regulatory effects, more rigorous analyses are needed to rule out other possible explanations.

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  • Randy Becker & John Tang, 2009. "U.S. Trade in Toxics: The Case of Chlorodifluoromethane (HCFC-22)," Working Papers 09-29, Center for Economic Studies, U.S. Census Bureau.
  • Handle: RePEc:cen:wpaper:09-29

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