@inbook{NBERc5350,
 Crossref = "NBERjaff05-2",
 title = "The Role of Patents for Bridging the Science to Market Gap",
 author = "Thomas Hellmann",
 BookTitle = "Academic Science and Entrepreneurship: Dual Engines of Growth",
 Publisher = "Journal of Economic Behavior and Organization, 63(4) (Elsevier)",
 year = "2007",
 month = "August",
 URL = "http://www.nber.org/chapters/c5350",
}
@book{NBERjaff05-2,
 title = "Academic Science and Entrepreneurship: Dual Engines of Growth",
 author = "Adam Jaffe and Josh Lerner and Scott Stern and Marie Thursby",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "Journal of Economic Behavior and Organization, 63(4) (Elsevier)",
 year = "2007",
 URL = "http://www.nber.org/books/jaff05-2",
}