TY - JOUR AU - Keohane,Nathaniel AU - Mansur,Erin T. AU - Voynov,Andrey TI - Averting Regulatory Enforcement: Evidence from New Source Review JF - National Bureau of Economic Research Working Paper Series VL - No. 13512 PY - 2007 Y2 - October 2007 UR - http://www.nber.org/papers/w13512 L1 - http://www.nber.org/papers/w13512.pdf N1 - Author contact info: Nathaniel Keohane Environmental Defense Fund E-Mail: nkeohane@environmentaldefense.org Erin T. Mansur Dartmouth College 6106 Rockefeller Hall Hanover, NH 03755 Tel: (603) 646-2531 Fax: (603) 646-2122 E-Mail: erin.mansur@dartmouth.edu Andrey Voynov Yale School of Forestry and Environmental Studies 205 Prospect Street New Haven, CT 06511 E-Mail: andrey.voynov@aya.yale.edu AB - This paper explores firms' response to regulatory enforcement. New Source Review, a provision of the Clean Air Act, imposes stringent emissions limitations on significantly modified older power plants. In 1999, the EPA sued owners of 46 plants for NSR violations. We study how electricity companies respond to both the perceived threat of future action, and the action itself. A discrete choice model estimates plants likelihood of being named in lawsuits increases with large historic emissions and investments. On the eve of the lawsuits, emissions at plants with a one standard deviation greater probability of being sued fell approximately ten percent. ER -