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Network Externalities, Mutuality, and Compatibility

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Abstract

Positive network externalities can arise when consumers benefit from the consumption of compatible products by other consumers (user-positive consumption externalities) or, alternatively, when they incur costs from the consumption of incompatible products by other consumers (nonuser-negative consumption externalities). But whereas user-positive externalities are typically mutually imposed and imply mutual benefit because they relate to interoperability, with nonuser-negative externalities the costs of incompatibility may be imposed unilaterally and borne asymmetrically. For example, increased risks of death and injury on the roads due to the co-existence of large and small vehicles are imposed exclusively by the owners of the large vehicles and borne exclusively by the occupants of the small vehicles. This paper compares the social optimality of incentives for compatibility under regimes involving user-positive and nonuser-negative externalities. Earlier work with respect to user-positive externalities (e.g., Katz and Shapiro, 1985) suggests that firms with relatively small networks or weak reputations tend to be biased in favor of compatibility, while individual firms’ incentives for compatibility are suboptimal when their networks are closely matched in size. Meanwhile, intuition suggests that with nonuser-negative externalities incentives for incompatibility should always be excessive, reflecting the notion that activities involving unilaterally imposed negative externalities will always be overprovided by the market (in the absence of regulation or Coaseian mitigation). Using a “location” model of differentiated products, we find that, under both regimes, incentives for compatibility tend to be suboptimal when firms’ networks are close in size, and excessive for the small firm when the networks differ greatly in size. Surprising public policy implications with respect to externalities are discussed.

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Bibliographic Info

Paper provided by NET Institute in its series Working Papers with number 08-37.

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Length: 31 pages
Date of creation: Oct 2008
Date of revision: Oct 2008
Handle: RePEc:net:wpaper:0837

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Web page: http://www.NETinst.org/

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Keywords: network effects; negative externalities; differentiated products; competition; welfare;

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  1. Gilbert, Richard J, 1992. "Symposium on Compatibility: Incentives and Market Structure," Journal of Industrial Economics, Wiley Blackwell, vol. 40(1), pages 1-8, March.
  2. Katz, Michael L & Shapiro, Carl, 1992. "Product Introduction with Network Externalities," Journal of Industrial Economics, Wiley Blackwell, vol. 40(1), pages 55-83, March.
  3. Economides, Nicholas, 1996. "The economics of networks," International Journal of Industrial Organization, Elsevier, vol. 14(6), pages 673-699, October.
  4. White, Michelle J, 2004. "The "Arms Race" on American Roads: The Effect of Sport Utility Vehicles and Pickup Trucks on Traffic Safety," Journal of Law and Economics, University of Chicago Press, vol. 47(2), pages 333-55, October.
  5. Nicholas Economides, 1997. "Network Externalities, Complementarities, and Invitations to Enter," Industrial Organization 9701004, EconWPA.
  6. Matutes, Carmen & Regibeau, Pierre, 1992. "Compatibility and Bundling of Complementary Goods in a Duopoly," Journal of Industrial Economics, Wiley Blackwell, vol. 40(1), pages 37-54, March.
  7. Farrell, Joseph, 1989. "Converters, Compatibility, and the Control of Interfaces," Department of Economics, Working Paper Series qt8161p50b, Department of Economics, Institute for Business and Economic Research, UC Berkeley.
  8. Akerlof, George A & Dickens, William T, 1982. "The Economic Consequences of Cognitive Dissonance," American Economic Review, American Economic Association, vol. 72(3), pages 307-19, June.
  9. Katz, Michael L & Shapiro, Carl, 1985. "Network Externalities, Competition, and Compatibility," American Economic Review, American Economic Association, vol. 75(3), pages 424-40, June.
  10. Carmen Matutes & Pierre Regibeau, 1988. ""Mix and Match": Product Compatibility without Network Externalities," RAND Journal of Economics, The RAND Corporation, vol. 19(2), pages 221-234, Summer.
  11. Ian Ayres & Steven D. Levitt, 1998. "Measuring Positive Externalities From Unobservable Victim Precaution: An Empirical Analysis Of Lojack," The Quarterly Journal of Economics, MIT Press, vol. 113(1), pages 43-77, February.
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