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FOUNDATIONS OF AMBIGUITY AND ECONOMIC MODELLING

Published online by Cambridge University Press:  10 November 2009

Sujoy Mukerji
Sujoy Mukerji*
Affiliation:
Oxford University
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Abstract

Are foundations of models of ambiguity-sensitive preferences too flawed to be usefully applied to economic models? Al-Najjar and Weinstein (2009) say such is indeed the case. In this paper, first, we point out that many of the key arguments by Al-Najjar and Weinstein do not apply to quite a few of the ambiguity preference models of more recent vintage, and therefore to that extent do not undermine the foundational aspects or applicability of ambiguity models in general. Second, we argue the focus in that paper on Ellsberg examples is an overly narrow concern; the Ellsberg examples have their uses but they are not the best context to understand why reasonable real-world agents may find acting in an ambiguity-sensitive manner normatively or prescriptively appealing. Finally, normative considerations aside, we submit that Al-Najjar and Weinstein are unduly dismissive of the power of such preferences to provide illuminating positive analyses of economic phenomena.

Type
Essay
Information
Economics & Philosophy , Volume 25 , Issue 3: Economics and Philosophy on Ambiguity Aversion , November 2009 , pp. 297 - 302
Copyright
Copyright © Cambridge University Press 2009

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References

REFERENCES

Al-Najjar, N. and Weinstein, J.. 2009. The ambiguity aversion literature: a critical assessment. Economics and Philosophy (25).CrossRefGoogle Scholar
Baliga, S., Hanany, E. and Klibanoff, P.. 2009. Ambiguity, dynamic consistency and behavioral phenomena. mimeo., Northwestern University.Google Scholar
Ellsberg, D. 1961. Risk, ambiguity and the savage axioms. Quarterly Journal of Economics 75: 643–69.CrossRefGoogle Scholar
Epstein, L. and Schneider, M.. 2003. Recursive multiple-priors. Journal of Economic Theory 113: 1–31.CrossRefGoogle Scholar
Gilboa, I. and Schmeidler, D.. 1989. Maxmin expected utility with a non-unique prior. Journal of Mathematical Economics 18: 141–53.CrossRefGoogle Scholar
Gilboa, I., Postlewaite, A. and Schmeidler, D.. 2008. Probability and uncertainty in economic modeling. Journal of Economic Perspectives 22: 173–88.CrossRefGoogle Scholar
Hanany, E. and Klibanoff, P.. 2007. Updating preferences with multiple priors. Theoretical Economics 2: 261–98.Google Scholar
Hanany, E. and Klibanoff, P.. 2008. Updating ambiguity averse preferences. mimeo., Northwestern University.Google Scholar
Hansen, L. 2007. Beliefs, doubts and learning: The valuation of macroeconomic risk, American Economic Review 97: 1–30.CrossRefGoogle Scholar
Hansen, L. and Sargent, T. 2008. Fragile beliefs and the price of model uncertainty. mimeo., University of Chicago.Google Scholar
Klibanoff, P., Marinacci, M. and Mukerji, S.. 2005. A smooth model of decision making under ambiguity. Econometrica 73: 1849–92.CrossRefGoogle Scholar
Klibanoff, P., Marinacci, M. and Mukerji, S.. 2009. Recursive smooth ambiguity preferences. Journal of Economic Theory 144: 930–76.CrossRefGoogle Scholar
Knight, F. 1921. Risk, uncertainty, and profit. New York: Houghton, Mifflin.Google Scholar
Maccheroni, F., Marinacci, M. and Rustichini, A.. 2006. Dynamic variational preferences. Journal of Economic Theory 128: 4–44.CrossRefGoogle Scholar
Mukerji, S. 1997. Understanding the nonadditive probability decision model. Economic Theory 9: 23–46.CrossRefGoogle Scholar
Mukerji, S. and Tallon, J.-M.. 2004. An overview of economic applications of David Schmeidler's models of decision making under uncertainty. In Uncertainty in economic theory, ed. Gilboa, I., 283–302. London: Routledge.CrossRefGoogle Scholar
Schmeidler, D. 1989. Subjective probability and expected utility without additivity. Econometrica 57: 571–87.CrossRefGoogle Scholar