@techreport{NBERw6831,
 title = "The Strategic Use of Tying to Preserve and Create Market Power in Evolving Industries",
 author = "Dennis W. Carlton and Michael Waldman",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "6831",
 year = "1998",
 month = "December",
 URL = "http://www.nber.org/papers/w6831",
 abstract = {This paper investigates how the tying of complementary products can be used to preserve and  extend monopoly positions. We first show how a firm that is a monopolist of a product in the current period can use tying to preserve its monopoly position in future periods.  We then show using related arguments how a monopolist in one market can employ tying to extend its monopoly position into a newly emerging market.  The analysis focuses on the importance of entry costs and network externalities.  The paper includes a discussion of antitrust implications.},
}