Distinguishing the Effect of Overconfidence from Rational Best-Response on Information Aggregation

Shimon Kogan

Review of Financial Studies, 2009, vol. 22, issue 5, pages 1889-1914

Abstract: This article studies the causal effect of individuals' overconfidence and bounded rationality on information aggregation by using a new multiperiod game in which agents are rewarded for submitting accurate estimates of an unknown asset's value based on (i) their private information and (ii) others' past estimates. By carrying out laboratory sessions of this game in which subjects' overconfidence is a treatment variable, I find that overconfidence affects the information aggregation process by increasing the dispersion of estimates and decreasing the rate of estimates' convergence. However, even when subjects are not overconfident, qualitatively similar deviations from the fully rational model predictions are observed. I show that this can be explained by subjects' strategic response to errors. The Author 2008. Published by Oxford University Press on behalf of The Society for Financial Studies. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org, Oxford University Press.

Date: 2009

Downloads: (external link)
http://hdl.handle.net/10.1093/rfs/hhn075 (application/pdf)
Access to full text is restricted to subscribers.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: http://EconPapers.repec.org/RePEc:oup:rfinst:v:22:y:2009:i:5:p:1889-1914

Ordering information: This journal article can be ordered from
http://www4.oup.co.uk/revfin/subinfo/

Access Statistics for this article

Review of Financial Studies is edited by Maureen O'Hara

More articles in Review of Financial Studies from Oxford University Press for Society for Financial Studies
Address: Oxford University Press, Journals Department, 2001 Evans Road, Cary, NC 27513 USA.
Contact information at EDIRC.
Series data maintained by Christopher F. Baum ().