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Core Many-to-one Matchings by Fixed-point Methods

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Author Info

  • Federico Echenique

    (Caltech)

  • Jorge Oviedo

    (Universidad de San Luis)

Abstract

We characterize the core many-to-one matchings as fixed points of a map. Our characterization gives an algorithm for finding core allocations; the algorithm is efficient and simple to implement. Our characterization does not require substitutable preferences, so it is separate from the structure needed for the non-emptiness of the core. When preferences are substitutable, our characterization gives a simple proof of the lattice structure of core matchings, and it gives a method for computing the join and meet of two core matchings.

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File URL: http://128.118.178.162/eps/game/papers/0302/0302001.pdf
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Bibliographic Info

Paper provided by EconWPA in its series Game Theory and Information with number 0302001.

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Length: 30 pages
Date of creation: 13 Feb 2003
Date of revision:
Handle: RePEc:wpa:wuwpga:0302001

Note: Type of Document - PDF; prepared on Linux PC; to print on PostScript; pages: 30
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Web page: http://128.118.178.162

Related research

Keywords: matching; supermodular games; tarski's fixed-point theorem;

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References

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  1. Ahmet Alkan, 2002. "A class of multipartner matching markets with a strong lattice structure," Economic Theory, Springer, vol. 19(4), pages 737-746.
  2. Sotomayor, Marilda, 1999. "Three remarks on the many-to-many stable matching problem," Mathematical Social Sciences, Elsevier, vol. 38(1), pages 55-70, July.
  3. Adachi, Hiroyuki, 2000. "On a characterization of stable matchings," Economics Letters, Elsevier, vol. 68(1), pages 43-49, July.
  4. Roth, Alvin E. & Sotomayor, Marilda, 1988. "Interior points in the core of two-sided matching markets," Journal of Economic Theory, Elsevier, vol. 45(1), pages 85-101, June.
  5. Kelso, Alexander S, Jr & Crawford, Vincent P, 1982. "Job Matching, Coalition Formation, and Gross Substitutes," Econometrica, Econometric Society, vol. 50(6), pages 1483-1504, November.
  6. Martinez, Ruth & Masso, Jordi & Neme, Alejandro & Oviedo, Jorge, 2000. "Single Agents and the Set of Many-to-One Stable Matchings," Journal of Economic Theory, Elsevier, vol. 91(1), pages 91-105, March.
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