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Semi-core equivalence

Author

Listed:
  • Pieter H. M. Ruys

    (Center for Economic Research, Tilburg University, PO Box 90153, NL-5000 LE Tilburg, THE NETHERLANDS)

  • Robert P. Gilles

    (Department of Economics, Virginia Polytechnic Institute & State University, Blacksburg, VA 24061-0316, USA)

  • Hans H. Haller

    (Department of Economics, Virginia Polytechnic Institute & State University, Blacksburg, VA 24061-0316, USA)

Abstract

The main requirements for equivalence of the core of an economy and the Walrasian equilibrium allocations are largeness and the freedom to form almost arbitrary coalitions in the Edgeworthian barter processes. We investigate whether constraints on coalition formation and coalitional barter alter these insights. Our notion of the semi-core imposes a restriction on the collection of formable coalitions that does not affect the fundamental equivalence property. Using our concept of the contract-core we show that additional constraints on coalitional barter can only be alleviated within an environment with sufficiently many formable coalitions: besides a contract-core equivalence theorem we show certain non-equivalence results.

Suggested Citation

  • Pieter H. M. Ruys & Robert P. Gilles & Hans H. Haller, 1997. "Semi-core equivalence," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 11(1), pages 101-127.
    • Handle: RePEc:spr:joecth:v:11:y:1997:i:1:p:101-127
    Note: Received: December 11, 1995; revised version: September 17, 1996
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    Cited by:

    1. Anna A. Klis, 2019. "Identity and equal treatment in negative externality agreements," International Environmental Agreements: Politics, Law and Economics, Springer, vol. 19(6), pages 615-630, December.

    More about this item

    JEL classification:

    • D41 - Microeconomics - - Market Structure, Pricing, and Design - - - Perfect Competition
    • D46 - Microeconomics - - Market Structure, Pricing, and Design - - - Value Theory
    • D50 - Microeconomics - - General Equilibrium and Disequilibrium - - - General

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