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Two characterizations of Cost Share Equilibria

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Abstract

We consider pure exchange economies with a finite number of private goods and the choice of non-Samuelsonian public goods. For this type of economies, Basile, Graziano, and Pesce (2016) proposed the notion of cost share equilibrium with individual payments for public goods varying according to individual benefits. This situation arises naturally when a level of provision is interpreted as a whole configuration of public policies or when cost share functions are interpreted as voluntary contributions rather than predetermined tax systems (see Mas- Colell (1980)). We establish the equivalence of cost share equilibria with cooperative and noncooperative game-theoretic solutions: 1. we characterize cost share equilibria as those allocations which cannot be improved upon by society; 2. we characterize cost share equilibria as the Nash equilibria of a game with two players. The cooperative solutions analyzed in the paper are defined via a contribution scheme which captures the fraction of the total cost of collective goods that each coalition of agents is expected to cover.

Suggested Citation

  • Maria Gabriella Graziano & Marialaura Pesce & Maria Romaniello, 2021. "Two characterizations of Cost Share Equilibria," CSEF Working Papers 628, Centre for Studies in Economics and Finance (CSEF), University of Naples, Italy, revised 24 May 2023.
    • Handle: RePEc:sef:csefwp:628
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    1. Martin Dufwenberg & Paul Heidhues & Georg Kirchsteiger & Frank Riedel & Joel Sobel, 2011. "Other-Regarding Preferences in General Equilibrium," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 78(2), pages 613-639.
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    6. Mas-Colell, Andreu & Silvestre, Joaquim, 1989. "Cost share equilibria: A Lindahlian approach," Journal of Economic Theory, Elsevier, vol. 47(2), pages 239-256, April.
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    10. Achille Basile & Maria Gabriella Graziano & Marialaura Pesce, 2016. "Oligopoly And Cost Sharing In Economies With Public Goods," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 57(2), pages 487-506, May.
    11. Diamantaras, Dimitrios & Gilles, Robert P & Scotchmer, Suzanne, 1996. "Decentralization of Pareto Optima in Economies with Public Projects, Nonessential Private Goods and Convex Costs," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 8(3), pages 555-564, October.
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    13. Diamantaras, Dimitrios & Gilles, Robert P, 1996. "The Pure Theory of Public Goods: Efficiency, Dencentralization, and the Core," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 37(4), pages 851-860, November.
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    More about this item

    Keywords

    Non-Samuelsonian public goods; Cost share equilibrium; Aubin core; Nash equilibrium.;
    All these keywords.

    JEL classification:

    • D49 - Microeconomics - - Market Structure, Pricing, and Design - - - Other
    • D51 - Microeconomics - - General Equilibrium and Disequilibrium - - - Exchange and Production Economies
    • C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games

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