IDEAS home Printed from
   My bibliography  Save this paper

Trends in Aggregate Vehicle Emissions: Do We Need To Emissions Test?


  • Matthew Kahn

    (Columbia University)


Vehicle emissions are falling. As the oldest vehicles in the fleet are scrapped and are replaced by cleaner vehicles, aggregate emissions decline. Given this trend, must costly used car regulation continue? The Clean Air Act of 1990 requires more stringent used car testing without considering the counter-factual of how aggregate emissions would evolve in the absence of more regulation. This paper use data on vehicle scrappage rates, vehicle emissions by model year, and county air quality levels in counties that do and do not emissions test to explore the past benefits of vehicle emissions testing and to extrapolate future emissions if regulation were not increased.

Suggested Citation

  • Matthew Kahn, 1995. "Trends in Aggregate Vehicle Emissions: Do We Need To Emissions Test?," Others 9507001, EconWPA.
  • Handle: RePEc:wpa:wuwpot:9507001

    Download full text from publisher

    File URL:
    Download Restriction: no

    File URL:
    Download Restriction: no

    File URL:
    Download Restriction: no

    References listed on IDEAS

    1. Portney, Paul R. & Mullahy, John, 1990. "Urban air quality and chronic respiratory disease," Regional Science and Urban Economics, Elsevier, vol. 20(3), pages 407-418, November.
    Full references (including those not matched with items on IDEAS)

    More about this item

    JEL classification:

    • P - Economic Systems
    • Q - Agricultural and Natural Resource Economics; Environmental and Ecological Economics
    • Z - Other Special Topics


    Access and download statistics


    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:wpa:wuwpot:9507001. See general information about how to correct material in RePEc.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (EconWPA). General contact details of provider: .

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service hosted by the Research Division of the Federal Reserve Bank of St. Louis . RePEc uses bibliographic data supplied by the respective publishers.