@inbook{NBERc0033,
 Crossref = "NBERjaff07-1",
 title = "When Ideas Are Not Free: The Impact of Patents on Scientific Research",
 author = "Fiona Murray and Scott Stern",
 BookTitle = "Innovation Policy and the Economy, Volume 7",
 Publisher = "MIT Press",
 pages = "33-69",
 year = "2007",
 month = "February",
 URL = "http://www.nber.org/chapters/c0033",
}
@book{NBERjaff07-1,
 title = "Innovation Policy and the Economy, Volume 7",
 author = "Adam B. Jaffe and Josh Lerner and Scott Stern",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "MIT Press",
 year = "2006",
 URL = "http://www.nber.org/books/jaff07-1",
}