@inbook{NBERc12235,
 Crossref = "NBERmair10-1",
 title = "Choosing Intellectual Protection: Imitation, Patent Strength and Licensing",
 author = "David Encaoua and Yassine Lefouili",
 BookTitle = "Contributions in Memory of Zvi Griliches",
 Publisher = "Annales D'Économie et de Statistique, 79-80, July-December 2005",
 pages = "241-271",
 year = "2010",
 month = "August",
 URL = "http://www.nber.org/chapters/c12235",
}
@book{NBERmair10-1,
 title = "Contributions in Memory of Zvi Griliches",
 author = "Jacques Mairesse and Manuel Trajtenberg",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "Annales D'Économie et de Statistique, 79-80, July-December 2005",
 year = "2010",
 URL = "http://www.nber.org/books/mair10-1",
}