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MODELLING INDIVIDUAL EXPERTISE IN GROUP JUDGEMENTS

Published online by Cambridge University Press:  19 February 2015

Dominik Klein  and
Jan Sprenger
Dominik Klein
Affiliation:
Tilburg Center for Logic, General Ethics and Philosophy of Science (TiLPS), Tilburg University, P.O. Box 90153, 5000 LE Tilburg, the Netherlands. Email: d.klein@uvt.nl.
Jan Sprenger
Affiliation:
Tilburg Center for Logic, General Ethics and Philosophy of Science (TiLPS), Tilburg University, P.O. Box 90153, 5000 LE Tilburg, the Netherlands. Email: j.sprenger@uvt.nl. URL: http://www.laeuferpaar.de.
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Abstract:

Group judgements are often – implicitly or explicitly – influenced by their members’ individual expertise. However, given that expertise is seldom recognized fully and that some distortions may occur (bias, correlation, etc.), it is not clear that differential weighting is an epistemically advantageous strategy with respect to straight averaging. Our paper characterizes a wide set of conditions under which differential weighting outperforms straight averaging and embeds the results into the multidisciplinary group decision-making literature.

Keywords

group decision-makingexpertisejudgement aggregationstatistical estimationsocial psychology
Type
Symposium on Individual and Social Deliberation
Information
Economics & Philosophy , Volume 31 , Issue 1 , March 2015 , pp. 3 - 25
Copyright
Copyright © Cambridge University Press 

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