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Convex Covers of Symmetric Games

Author

Listed:
  • John M. Rulnick

    (Department of Electrical and Computer Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, USA)

  • Lloyd S. Shapley

    (Department of Mathematics, University of California, Los Angeles, CA 90095, USA)

Abstract

We consider a multi-player, cooperative, transferable-utility, symmetric game (N, ) and associated convex covers, i.e., convex games (N, ~) such that ~ \geq . A convex cover is efficient iff ~(∅) = (∅) and ~(N) = (N); and minimal iff there is no convex cover ~ \neq ~ such that ~ \leq ~. Efficient and minimal convex covers are closely related to the core of (N, ); in fact, extreme points of the core are shown to correspond to efficient convex covers which are minimal and extreme. A necessary and sufficient condition is provided for minimality, and another for extremity. Construction of convex covers and a form of decomposition are treated in detail, and some useful properties are identified which may be recognized in terms of visibility of points on a graph of (N, ) and other elementary concepts.

Suggested Citation

  • John M. Rulnick & Lloyd S. Shapley, 1998. "Convex Covers of Symmetric Games," International Journal of Game Theory, Springer;Game Theory Society, vol. 26(4), pages 561-577.
  • Handle: RePEc:spr:jogath:v:26:y:1998:i:4:p:561-577
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