Judgment aggregation in search for the truth

Article dans une revue: We analyse the problem of aggregating judgments over multiple issues from the perspective of whether aggregate judgments manage to efficiently use all voters' private information. While new in judgment aggregation theory, this perspective is familiar in a different body of literature about voting between two alternatives where voters' disagreements stem from conflicts of information rather than interests. Combining the two bodies of literature, we consider a simple judgment aggregation problem and model the private information underlying voters' judgments. Assuming that voters share a preference for true collective judgments, we analyse the resulting strategic incentives and determine which voting rules efficiently use all private information. We find that in certain, but not all cases a quota rule should be used, which decides on each issue according to whether the proportion of 'yes' votes exceeds a particular quota.

Auteur(s)

Irem Bozbay, Franz Dietrich, Hans Peters

Revue
  • Games and Economic Behavior
Date de publication
  • 2014
Mots-clés JEL
C70 D70 D71 D80 D82
Mots-clés
  • Judgment aggregation
  • Private information
  • Efficient information aggregation
  • Strategic voting
Pages
  • 571-590
Version
  • 1