@techreport{NBERw12777,
 title = "Is the Endangered Species Act Endangering Species?",
 author = "John A. List and Michael Margolis and Daniel E. Osgood",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "12777",
 year = "2006",
 month = "December",
 URL = "http://www.nber.org/papers/w12777",
}