Modelling Biased Judgement with Weighted Updating
The weighted updating model is a generalization of Bayesian updating that allows for biased beliefs by weighting the functions that constitute Bayes' rule with real exponents. I provide an axiomatic basis for this framework and show that weighting a distribution affects the information entropy of the resulting distribution. This result provides the interpretation that weighted updating models biases in which individuals mistake the information content of data. I augment the base model in two ways, allowing it to account for additional biases. The first augmentation allows for discrimination between data. The second allows the weights to vary over time. I also find a set of sufficient conditions for the uniqueness of parameter estimation through maximum likelihood, with log-concavity playing a key role. An application shows that self attribution bias can lead to optimism bias.
|Date of creation:||30 Sep 2013|
|Date of revision:|
|Contact details of provider:|| Postal: |
Web page: https://mpra.ub.uni-muenchen.de
More information through EDIRC
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- S. Dellavigna., 2011.
"Psychology and Economics: Evidence from the Field,"
N.P. Redaktsiya zhurnala "Voprosy Economiki", vol. 5.
- S. Dellavigna., 2011. "Psychology and Economics: Evidence from the Field," VOPROSY ECONOMIKI, N.P. Redaktsiya zhurnala "Voprosy Economiki", vol. 4.
- Stefano DellaVigna, 2009. "Psychology and Economics: Evidence from the Field," Journal of Economic Literature, American Economic Association, vol. 47(2), pages 315-72, June.
- Koellinger, Philipp & Minniti, Maria & Schade, Christian, 2007.
""I think I can, I think I can": Overconfidence and entrepreneurial behavior,"
Journal of Economic Psychology,
Elsevier, vol. 28(4), pages 502-527, August.
- Philipp Köllinger & Maria Minniti & Christian Schade, 2005. ""I Think I Can, I Think I Can": Overconfidence and Entrepreneurial Behavior," Discussion Papers of DIW Berlin 501, DIW Berlin, German Institute for Economic Research.
- Robert Bain, 2009. "Error and optimism bias in toll road traffic forecasts," Transportation, Springer, vol. 36(5), pages 469-482, September.
- Stephanie Wang, 2012. "Speculative Overpricing in Asset Markets with Information Flows," Working Papers 489, University of Pittsburgh, Department of Economics, revised Jan 2012.
- Grether, David M., 1992.
"Testing bayes rule and the representativeness heuristic: Some experimental evidence,"
Journal of Economic Behavior & Organization,
Elsevier, vol. 17(1), pages 31-57, January.
- Grether, David M., 1990. "Testing Bayes Rule and the Representativeness Heuristic: Some Experimental Evidence," Working Papers 724, California Institute of Technology, Division of the Humanities and Social Sciences.
- David Hirshleifer, 2001.
"Investor Psychology and Asset Pricing,"
Journal of Finance,
American Finance Association, vol. 56(4), pages 1533-1597, 08.
- repec:oup:qjecon:v:95:y:1980:i:3:p:537-57 is not listed on IDEAS
When requesting a correction, please mention this item's handle: RePEc:pra:mprapa:50310. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Ekkehart Schlicht)
If references are entirely missing, you can add them using this form.