Mediation: Incomplete information bargaining with filtered communication

Xavier Jarque, Clara Ponsatí, József Sákovics

Research output: Contribution to journalArticleResearchpeer-review

18 Citations (Scopus)


We analyze a continuous-time bilateral double auction in the presence of two-sided incomplete information and a smallest money unit. A distinguishing feature of our model is that intermediate concessions are not observable by the adversary: they are only communicated to a passive auctioneer. An alternative interpretation is that of mediated bargaining. Perfect Bayesian Equilibria are characterized. We show that an equilibrium using only the extreme agreements always exists and display the necessary and sufficient condition for the existence of equilibra which yield intermediate agreements. For the symmetric case with uniform-type distribution we numerically calculate the equilibria. We find that the equilibrium which does not use compromise agreements is the least efficient, however the social welfare of the rest of the equilibria is decreasing in the number of compromise agreements used. © 2003 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)803-830
JournalJournal of Mathematical Economics
Issue number7
Publication statusPublished - 1 Sep 2003


  • Bargaining
  • Continuous time
  • Mediation


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