Arbeitspapier

Implicit Knowledge in Unawareness Structures

Awareness structures by Fagin and Halpern (1988) (FH) feature a syntactic awareness correspondence and accessibility relations modeling implicit knowledge. They are a flexible model of unawareness, and best interpreted from a outside modeler's perspective. Unawareness structures by Heifetz, Meier, and Schipper (2006, 2008) (HMS) model awareness by a lattice of state spaces and explicit knowledge via possibility correspondences. Sublattices thereof can be interpreted as subjective views of agents. Open questions include (1) how implicit knowledge can be defined in HMS structures, and (2) in which way FH structures can be extended to model the agents' subjective views. In this paper, we address (1) by defining implicit knowledge such that it is consistent with explicit knowledge in HMS models. We also introduce a variant of HMS models that instead of explicit knowledge, takes implicit knowledge and awareness as primitives. Further, we address (2) by introducing a category of FH models that are modally equivalent relative to sublanguages and can be interpreted as agents' subjective views depending on their awareness. These constructions allow us to show an equivalence between HMS and FH models. As a corollary, we obtain soundness and completeness of HMS models with respect to the Logic of Propositional Awareness, based on a language featuring both implicit and explicit knowledge.

Language
Englisch

Bibliographic citation
Series: Working Paper ; No. 360

Classification
Wirtschaft
Search; Learning; Information and Knowledge; Communication; Belief; Unawareness
Game Theory and Bargaining Theory: General
Subject
Unawareness
awareness
implicit knowledge
explicit knowledge

Event
Geistige Schöpfung
(who)
Belardinelli, Gaia
Schipper, Burkhard C.
Event
Veröffentlichung
(who)
University of California, Department of Economics
(where)
Davis, CA
(when)
2023

Handle
Last update
10.03.2025, 11:42 AM CET

Data provider

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Object type

  • Arbeitspapier

Associated

  • Belardinelli, Gaia
  • Schipper, Burkhard C.
  • University of California, Department of Economics

Time of origin

  • 2023

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