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Existence, uniqueness and efficiency of equilibrium in hedonic markets with multidimenstional types

Author

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  • Ivar Ekeland
Abstract
We study equilibrium in hedonic markets, when consumers and suppliers have reservation utilities, and the utility functions are separable with respect to price. There is one indivisible good, which comes in different qualities; each consumer buys 0 or 1 unit, and each supplier sells 0 or 1 unit. Consumer types, supplier types and qualities can be either discrete of continuous, in which case they are allowed to be multidimensional. Prices play a double role: they keep some agents out of the market, and they match the remaining ones pairwise. We define equilibrium prices and equilibrium distributions, and we prove that equilibria exist, we investigate to what extend equilibrium prices and distributions are unique, and we prove that equilibria are efficient. In the particular case when there is a continuum of types, and a generalized Spence-Mirrlees condition is satisfied, we prove the existence of a pure equilibrium, where demand distributions are in fact demand functions, and we show to what extent it is unique. The proofs rely on convex analysis, and care has been given to illustrate the theory with examples.

Suggested Citation

  • Ivar Ekeland, 2008. "Existence, uniqueness and efficiency of equilibrium in hedonic markets with multidimenstional types," Papers 0807.3960, arXiv.org.
    • Handle: RePEc:arx:papers:0807.3960
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    File URL: http://arxiv.org/pdf/0807.3960
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    References listed on IDEAS

    as
    1. Ivar Ekeland & James J. Heckman & Lars Nesheim, 2004. "Identification and Estimation of Hedonic Models," Journal of Political Economy, University of Chicago Press, vol. 112(S1), pages 60-109, February.
    2. Jean-Charles Rochet & Philippe Chone, 1998. "Ironing, Sweeping, and Multidimensional Screening," Econometrica, Econometric Society, vol. 66(4), pages 783-826, July.
    3. H. S. Houthakker, 1952. "Compensated Changes in Quantities and Qualities Consumed," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 19(3), pages 155-164.
    4. Gretsky, Neil E & Ostroy, Joseph M & Zame, William R, 1992. "The Nonatomic Assignment Model," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 2(1), pages 103-127, January.
    5. Rosen, Sherwin, 1974. "Hedonic Prices and Implicit Markets: Product Differentiation in Pure Competition," Journal of Political Economy, University of Chicago Press, vol. 82(1), pages 34-55, Jan.-Feb..
    6. Tjalling C. Koopmans & Martin J. Beckmann, 1955. "Assignment Problems and the Location of Economic Activities," Cowles Foundation Discussion Papers 4, Cowles Foundation for Research in Economics, Yale University.
    7. Kelvin J. Lancaster, 1966. "A New Approach to Consumer Theory," Journal of Political Economy, University of Chicago Press, vol. 74(2), pages 132-132.
    8. repec:dau:papers:123456789/6443 is not listed on IDEAS
    9. Mussa, Michael & Rosen, Sherwin, 1978. "Monopoly and product quality," Journal of Economic Theory, Elsevier, vol. 18(2), pages 301-317, August.
    10. repec:dau:papers:123456789/6486 is not listed on IDEAS
    11. Gretsky, Neil E. & Ostroy, Joseph M. & Zame, William R., 1999. "Perfect Competition in the Continuous Assignment Model," Journal of Economic Theory, Elsevier, vol. 88(1), pages 60-118, September.
    Full references (including those not matched with items on IDEAS)

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    Cited by:

    1. Kuminoff, Nicolai V. & Jarrah, Abdul Salam, 2010. "A new approach to computing hedonic equilibria and investigating the properties of locational sorting models," Journal of Urban Economics, Elsevier, vol. 67(3), pages 322-335, May.

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