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Assignment games with population monotonic allocation schemes

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  • Tamás Solymosi

    (Corvinus University of Budapest)

Abstract

We characterize the assignment games which admit a population monotonic allocation scheme (PMAS) in terms of efficiently verifiable structural properties of the nonnegative matrix that induces the game. We prove that an assignment game is PMAS-admissible if and only if the positive elements of the underlying nonnegative matrix form orthogonal submatrices of three special types. In game theoretic terms it means that an assignment game is PMAS-admissible if and only if it contains either a veto player or a dominant veto mixed pair, or the game is a composition of these two types of special assignment games. We also show that in PMAS-admissible assignment games all core allocations can be extended to a PMAS, and the nucleolus coincides with the tau-value.

Suggested Citation

  • Tamás Solymosi, 2024. "Assignment games with population monotonic allocation schemes," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 62(1), pages 67-88, February.
    • Handle: RePEc:spr:sochwe:v:62:y:2024:i:1:d:10.1007_s00355-023-01477-z
    DOI: 10.1007/s00355-023-01477-z
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    1. Norde, Henk & Moretti, Stefano & Tijs, Stef, 2004. "Minimum cost spanning tree games and population monotonic allocation schemes," European Journal of Operational Research, Elsevier, vol. 154(1), pages 84-97, April.
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    3. Solymosi, Tamas & Raghavan, Tirukkannamangai E S, 1994. "An Algorithm for Finding the Nucleolus of Asignment Games," International Journal of Game Theory, Springer;Game Theory Society, vol. 23(2), pages 119-143.
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    5. Saadia El Obadi & Silvia Miquel, 2019. "Assignment Games with a Central Player," Group Decision and Negotiation, Springer, vol. 28(6), pages 1129-1148, December.
    6. T. E. S. Raghavan & Tamás Solymosi, 2001. "Assignment games with stable core," International Journal of Game Theory, Springer;Game Theory Society, vol. 30(2), pages 177-185.
    7. Stefano Moretti & Henk Norde, 2021. "A note on weighted multi-glove games," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 57(4), pages 721-732, November.
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