6Arthur, B. W. . (1988): "Competing Technologiess An Overview", Ed. ..in Technical Change and Economic Theory, pp.590- 607, Pinter Publishers, New York.
7Katz, Michael, and Carl Shapiro ( 1985 ): " Network Externalities, Competition and Compatibility," American Economic Review, Vol. 75 (3), pp. 424-440.
8Katz, Michael, and Carl Shapiro (1986): "Technology Adoption in the Presence of Network Externalities", Journal of Political Economy, Vol. 94, pp. 822-841.
9Laffont, Jean-Jacques and Jean Tirole (1994)s "Access Pricing and Competition", European Economic Review, Vol. 38,pp. 1673-1710.
10Milton, M, and L. Perer(2000) : "Universal Service from the Bottom Up: A Study of Telephone Penetration in Camden,New Jersey", The Information Society 12, No. 3, pp. 273-292.
3Spence, A. Micheal. Entry, Capacity, Invest ment and Oligopolistic Pricing[J]. Ball Journal of Economics, 1977 (8) :534 - 544.
4Schmalensee, Richard. Entry Deterrence in the Beady - to - Eat Breakfast Cereal Industry [ J ]. Ball Journal of Economics, 1978 (9) :305 - 327.
5Dixit, Avinash. The Role of Investment in Entry Deterrence [ J ]. Economic Journal, 1980 ( 90 ) : 95 - 106.
6Rees, R. , Tacit Collusion [ J ]. Oxford Review of Economic Policy, 1993 (9) :27 -40.
7Bernadette Andreosso and David Jacobson, In- dustrial Economics and Organization: A Europe-an Perspective [ M ]. Second Edition, The McGrawHill Company ,2005:239.
8Philip Ketler. Marketing Management, Analy- sis, .Planning, Implementatlon, and Control. Ninth Eidition [ M ]. Prentice Hall , 2000 : 404.
9Friedman, A Non- cooperative Equilibrium for Supergames [ J ]. Respective of Journal of Eco- nomic Study,1971 (38) ; 1 - 12.