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Differential marginality, inessential games and convex combinations of values

Author

Listed:
  • Zeguang Cui

    (Shanghai University)

  • Erfang Shan

    (Shanghai University)

  • Wenrong Lyu

    (Shanghai University)

Abstract

The principle of differential marginality (Casajus in Theory and Decis 71(2):163-–174) for cooperative games is a very appealing property that requires equal productivity differentials to translate into equal payoff differentials. In this paper we apply this property to axiomatic characterizations of values. We show that differential marginality implies additivity and symmetry under certain conditions. Based on this result, we propose new characterizations of the equal division and the equal surplus division values. Finally, we characterize two classes of convex combinations of values, i.e., $$\alpha$$ α -egalitarian Shapley values and $$\alpha$$ α -equal surplus division values, by employing differential marginality and establishing the uniqueness of these values on inessential games.

Suggested Citation

  • Zeguang Cui & Erfang Shan & Wenrong Lyu, 2024. "Differential marginality, inessential games and convex combinations of values," Theory and Decision, Springer, vol. 96(3), pages 463-475, May.
    • Handle: RePEc:kap:theord:v:96:y:2024:i:3:d:10.1007_s11238-023-09954-8
    DOI: 10.1007/s11238-023-09954-8
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    References listed on IDEAS

    as
    1. André Casajus, 2011. "Differential marginality, van den Brink fairness, and the Shapley value," Theory and Decision, Springer, vol. 71(2), pages 163-174, August.
    2. van den Brink, Rene, 2007. "Null or nullifying players: The difference between the Shapley value and equal division solutions," Journal of Economic Theory, Elsevier, vol. 136(1), pages 767-775, September.
    3. Casajus, André & Huettner, Frank, 2013. "Null players, solidarity, and the egalitarian Shapley values," Journal of Mathematical Economics, Elsevier, vol. 49(1), pages 58-61.
    4. René Brink & Yukihiko Funaki & Yuan Ju, 2013. "Reconciling marginalism with egalitarianism: consistency, monotonicity, and implementation of egalitarian Shapley values," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 40(3), pages 693-714, March.
    5. Casajus, André & Huettner, Frank, 2014. "Null, nullifying, or dummifying players: The difference between the Shapley value, the equal division value, and the equal surplus division value," Economics Letters, Elsevier, vol. 122(2), pages 167-169.
    6. Ruiz, Luis M & Valenciano, Federico & Zarzuelo, Jose M, 1996. "The Least Square Prenucleolus and the Least Square Nucleolus. Two Values for TU Games Based on the Excess Vector," International Journal of Game Theory, Springer;Game Theory Society, vol. 25(1), pages 113-134.
    7. André Casajus & Koji Yokote, 2019. "Weakly differentially monotonic solutions for cooperative games," International Journal of Game Theory, Springer;Game Theory Society, vol. 48(3), pages 979-997, September.
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