The probability of collective choice with shared knowledge structures

  • Authors:
  • Whitman Richards;Brendan D. McKay;Diana Richards

  • Affiliations:
  • Massachusetts Institute of Technology;Australian National University;University of Minnesota

  • Venue:
  • Journal of Mathematical Psychology
  • Year:
  • 2002

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Abstract

Complex decision making typically involves many agents attempting to aggregate many alternatives. If agents' preferences are unconstrained, cyclic outcomes are highly probable. In contrast, we show that if agents share similar models of the choice domain, then a stable collective outcome occurs with about 90% probability. These results have implications for systems of interacting agents, such as group decisions by individuals in social settings or interpretations of sense data by competing perceptual modules of a brain.