The New Palgrave Dictionary of Economics

2018 Edition
| Editors: Macmillan Publishers Ltd

Product Differentiation

  • Simon P. Anderson
Reference work entry


Product differentiation is pervasive in markets. It is at the heart of structural empiricism and it smoothes jagged behaviour that causes paradoxical outcomes in several theoretical models. Firms differentiate their products to avoid ruinous price competition. Representative consumer, discrete choice and location models are not necessarily inconsistent, but performance depends crucially on the degree of localization of competition. With (symmetric) global competition, rents are typically small and market variety near optimal. With local competition, profits may be protected because entrants must find profitable niches. These rents lead firms to competitively dissipative them, and performance may be poor.


Bertrand competition Bertrand paradox Business stealing Chain linking Characteristics Circle model Constant elasticity of substitution (CES) model Diamond paradox Discrete choice models Endogenous growth General probit model Horizontal and vertical differentiation Intra-industry trade Local competition Location models Market power Menu costs Monopolistic competition Nested logit model Network externalities New Keynesian macroeconomics Product differentiation Quality ladders Representative consumer models Spatial competition Vertical differentiation 

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  1. Anderson, S.P., A. de Palma, and J.-F. Thisse. 1992. Discrete choice theory of product differentiation. Cambridge, MA: MIT Press.Google Scholar
  2. Archibald, G.C., B.C. Eaton, and R.G. Lipsey. 1986. Address models of value theory. In New developments in the analysis of market structure, ed. J.S. Stiglitz and G. Frank Mathewson. Cambridge, MA: MIT Press.Google Scholar
  3. Berry, S., J. Levinsohn, and A. Pakes. 1995. Automobile prices in market equilibrium. Econometrica 63: 841–890.CrossRefGoogle Scholar
  4. Chamberlin, E. 1933. The theory of monopolistic competition. Cambridge, MA: Harvard University Press.Google Scholar
  5. D’Aspremont, C., J.J. Gabszewicz, and J.-F. Thisse. 1979. On hotelling’s ‘stability in competition’. Econometrica 47: 1145–1150.CrossRefGoogle Scholar
  6. Hotelling, H. 1929. Stability in competition. Economic Journal 39: 41–57.CrossRefGoogle Scholar
  7. Lancaster, K.J. 1966. A new approach to consumer theory. Journal of Political Economy 74: 132–157.CrossRefGoogle Scholar
  8. Spence, A.M. 1976. Product selection, fixed costs and monopolistic competition. Review of Economic Studies 43: 217–235.CrossRefGoogle Scholar
  9. Vickrey, W.S. 1964. Microstatics. New York: Harcourt, Brace and World [The section ‘Spatial competition and monopolistic competition’ repr. in International Journal of Industrial Organization 17 (1999): 953–963].Google Scholar

Copyright information

© Macmillan Publishers Ltd. 2018

Authors and Affiliations

  • Simon P. Anderson
    • 1
  1. 1.