@techreport{NBERw7068,
 title = "Legal Monopoly:  Patents and Antitrust Litigation in U.S. Manufacturing, 1970-1998",
 author = "B. Zorina Khan",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "7068",
 year = "1999",
 month = "April",
 URL = "http://www.nber.org/papers/w7068",
 abstract = {This paper presents an empirical analysis of the relationship between patenting, innovation, and federal antitrust enforcement towards firms in the manufacturing sector.  I examine whether the likelihood of antitrust litigation is influenced by patent histories and R&D expenditures, after controlling for other firm-specific variables including size and likelihood of antitrust charges for medium and large firms.  Smaller firms with faster sales growth are also more likely to be charged with antitrust violations.},
}