5th ENCODE Workshop on Group Accuracy, Deliberation, and Social Influence

October 3, 2023
Erasmus Institute for Philosophy and Economics (EIPE), Erasmus University Rotterdam



  • NWO


Utrecht University
London School of Economics


Ghent University

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According to the celebrated Condorcet Jury Theorem, if we can dispose of a series of jurors who each have an independent, better than random accuracy regarding a binary issue, then the larger the group of jurors we take, the more accurate the group’s majority opinion on this issue will be. In the limit, the majority opinion will be fully reliable. This mathematical result has provided the starting point for a rich literature on the wisdom of crowds and democratic decision-making. 

In practice, however, opinions are not independent. Decision-makers are typically connected through networks of social influence, and before casting their opinion, they may deliberate collectively. When doing so, the shape of the network, the order in which they exchange information, the levels of trustworthiness attributed to them, and strategic considerations are crucial for the eventual outcome of the process. The aim of this workshop is to cast light on the role of these and other parameters in group deliberation, and their implications for group accuracy and democracy. 


  • 9h45-10h00     Welcome 
  • 10h00-11h00   Kai Spiekermann, London School of Economics, "Deliberation and Wisdom of the Crowds"
  • 11h15-12h00   Maaike Los, University of Groningen, "On the Graph Theory of Majority Illusions"
  • 12h15-13h00   Hein Duijf, Utrecht University, "Voting and Social Networks"
  • 13h00-14h30   lunch break 
  • 14h30-15h15   Adrian Haret, LMU Munich, "Deliberation as Evidence Disclosure: A Tale of Two Protocol Types"
  • 15h15-16h00   Ines Lindner, Free University of Amsterdam, "Naïve Learning in Social Networks: Bots as a Singularity"
  • 16h15-17h15   Olivier Roy, University of Bayreuth, " Anchoring as a Structural Bias of Deliberation"
  • 18h00-             Workshop Dinner 

For the full programme & abstracts: click on the link below

Participation is free of charge, but the available spots are limited. Please notify us before September 19th via [email protected] in case you would like to attend. Please put “participation: ENCODE workshop” in the subject of your email. A full programme, incl. abstracts and location will be announced in September

Funding & organization:  

The ENCODE workshops are organized bi-annually at the EIPE/ESPhil (Erasmus University of Rotterdam), as part of the NWO-funded ENCODE project (VI.Vidi.191.105).  

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September 19, 2023, 5:00pm CET

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