@techreport{NBERw13823,
 title = "The Origins of Industrial Scientific Discoveries",
 author = "James D. Adams and J. Roger Clemmons",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "13823",
 year = "2008",
 month = "February",
 URL = "http://www.nber.org/papers/w13823",
}