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Welfarism and Axiomatic Bargaining Theory

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  • John E. ROEMER

    (University of California)

Abstract

Consider the domain of economic environments E whose typical element is ξ = (U₁, U₂, Ω, ω*), where ui are Neumann-Morgenstern utility functions, Ω is a set of lotteries on a fixed finite set of alternatives, and ω ϵ Ω. A mechanism f associates to each ξ a lottery f(ξ) in Ω. Formulate the natural version of Nash's axioms, from his bargaining solution, for mechanisms on this domain, (e.g., IIA says that if ξ = (U₁, U₂, Δ ⊂ Ω, and f ∈ It is shown that the Nash axioms (Pareto, symmetry, IIA, invariance w. r. t. cardinal transformations of the utility functions) hardly restrict the behavior of the mechanism at all. In particular, for any integer M, choose M environments ξi, i = 1,..., M, and choose a Pareto optimal lottery ωi ∈ Ωi, restricted only so that no axiom is directly contradicted by these choices. Then there is a mechanism f for which f (ξi) = ωi, which satisfies all the axioms, and is continuous on E.

Suggested Citation

  • John E. ROEMER, 1990. "Welfarism and Axiomatic Bargaining Theory," Discussion Papers (REL - Recherches Economiques de Louvain) 1990032, Université catholique de Louvain, Institut de Recherches Economiques et Sociales (IRES).
    • Handle: RePEc:ctl:louvre:1990032
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    Cited by:

    1. d'Aspremont, Claude & Gevers, Louis, 2002. "Social welfare functionals and interpersonal comparability," Handbook of Social Choice and Welfare, in: K. J. Arrow & A. K. Sen & K. Suzumura (ed.), Handbook of Social Choice and Welfare, edition 1, volume 1, chapter 10, pages 459-541, Elsevier.
    2. Vincent Martinet & Pedro Gajardo & Michel Lara, 2024. "Bargaining on monotonic social choice environments," Theory and Decision, Springer, vol. 96(2), pages 209-238, March.
    3. Marco Mariotii, 1996. "Fair bargains: distributive justice and Nash Bargaining Theory," Game Theory and Information 9611003, University Library of Munich, Germany, revised 06 Dec 1996.
    4. Vincent Martinet & Pedro Gajardo & Michel de Lara, 2021. "Bargaining On Monotonic Economic Environments," Working Papers hal-03206724, HAL.

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