The dual theory of the smooth ambiguity model

Hideki Iwaki, Yusuke Osaki

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

This paper studies the "dual" theory of the smooth ambiguity model introduced by Klibanoff et al. (Econometrica 73:1849-1892, 2005). Unlike the original model, we characterize attitudes toward ambiguity captured by second-order probabilities. First, we give a set of axioms to derive a dual representation of the smooth ambiguity model. Second, we present a characterization of ambiguity aversion. Last, as an application of our dual model to a portfolio problem, we conduct comparative static predictions which give sufficient conditions to guarantee that an increase in smooth ambiguity aversion decreases the optimal portfolio.

Original languageEnglish
Pages (from-to)275-289
Number of pages15
JournalEconomic Theory
Volume56
Issue number2
DOIs
Publication statusPublished - 2014 Jan 1
Externally publishedYes

Fingerprint

Dual theory
Ambiguity aversion
Axioms
Prediction
Optimal portfolio
Guarantee
Comparative statics

Keywords

  • Ambiguity
  • Ambiguity aversion
  • Comparative statics
  • Smooth ambiguity model

ASJC Scopus subject areas

  • Economics and Econometrics

Cite this

The dual theory of the smooth ambiguity model. / Iwaki, Hideki; Osaki, Yusuke.

In: Economic Theory, Vol. 56, No. 2, 01.01.2014, p. 275-289.

Research output: Contribution to journalArticle

Iwaki, Hideki ; Osaki, Yusuke. / The dual theory of the smooth ambiguity model. In: Economic Theory. 2014 ; Vol. 56, No. 2. pp. 275-289.
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