@inbook{NBERc6762,
 Crossref = "NBERcutl00-1",
 title = "The Adoption and Impact of Advanced Emergency Response Services",
 author = "Susan Athey and Scott Stern",
 BookTitle = "The Changing Hospital Industry: Comparing For-Profit and Not-for-Profit Institutions",
 Publisher = "University of Chicago Press",
 pages = "113-168",
 year = "2000",
 month = "January",
 URL = "http://www.nber.org/chapters/c6762",
}
@book{NBERcutl00-1,
 title = "The Changing Hospital Industry: Comparing For-Profit and Not-for-Profit Institutions",
 author = "David M. Cutler",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2000",
 URL = "http://www.nber.org/books/cutl00-1",
}