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Alternative Semantics for Unawareness

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Author Info

  • Joseph Y. Halpern

    (Cornell University)

Abstract

Modica and Rustichini [Theory and Decision 37, 1994] provided a logic for reasoning about knowledge where agents may be unaware of certain propositions. However, their original approach had the unpleasant property that nontrivial unawareness was incompatible with partitional information structures. More recently, Modica and Rustichini [Games and Economic Behavior 27:2, 1999] have provided an approach that allows for nontrivial unawareness in partitional information structures. Here it is shown that their approach can be viewed as a special case of a general approach to unawareness considered by Fagin and Halpern [Artificial Intelligence 34, 1988].

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File URL: http://128.118.178.162/eps/game/papers/0004/0004010.pdf
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Bibliographic Info

Paper provided by EconWPA in its series Game Theory and Information with number 0004010.

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Length: 19 pages
Date of creation: 22 Nov 2000
Date of revision:
Handle: RePEc:wpa:wuwpga:0004010

Note: Type of Document - PDF; prepared on Unix; pages: 19; figures: included. To appear, Games and Economic Behavior 37. 1994].
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Web page: http://128.118.178.162

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Keywords: awareness; unawareness;

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  1. Robert J. Aumann, 1999. "Interactive epistemology I: Knowledge," International Journal of Game Theory, Springer, vol. 28(3), pages 263-300.
  2. Modica, Salvatore & Rustichini, Aldo, 1999. "Unawareness and Partitional Information Structures," Games and Economic Behavior, Elsevier, vol. 27(2), pages 265-298, May.
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