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Stability and the immediate acceptance rule when school priorities are weak

Author

Listed:
  • Wonki Jo Cho

    (Sogang University)

  • Battal Doğan

    (University of Lausanne)

Abstract

In a model of school choice, we allow school priorities to be weak and study the preference revelation game induced by the immediate acceptance (IA) rule (also known as the Boston rule), or the IA game. When school priorities can be weak and matches probabilistic, three stability notions—ex post stability, ex ante stability, and strong ex ante stability—and two ordinal equilibrium notions—sd equilibrium and strong sd equilibrium—become available (“sd” stands for stochastic dominance). We show that for no combination of stability and equilibrium notions does the set of stable matches coincide with the set of equilibrium matches of the IA game. This stands in contrast with the existing result that the two sets are equal when priorities are strict. We also show that in the presence of weak priorities, the transition from the IA rule to the deferred acceptance rule may, in fact, harm some students.

Suggested Citation

  • Wonki Jo Cho & Battal Doğan, 2017. "Stability and the immediate acceptance rule when school priorities are weak," International Journal of Game Theory, Springer;Game Theory Society, vol. 46(4), pages 991-1014, November.
    • Handle: RePEc:spr:jogath:v:46:y:2017:i:4:d:10.1007_s00182-016-0562-6
    DOI: 10.1007/s00182-016-0562-6
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    References listed on IDEAS

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    Cited by:

    1. Minoru Kitahara & Yasunori Okumura, 2021. "Improving efficiency in school choice under partial priorities," International Journal of Game Theory, Springer;Game Theory Society, vol. 50(4), pages 971-987, December.

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    More about this item

    Keywords

    School choice; Stability; Immediate acceptance;
    All these keywords.

    JEL classification:

    • C78 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Bargaining Theory; Matching Theory
    • D71 - Microeconomics - - Analysis of Collective Decision-Making - - - Social Choice; Clubs; Committees; Associations
    • D78 - Microeconomics - - Analysis of Collective Decision-Making - - - Positive Analysis of Policy Formulation and Implementation

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