Ambiguity in the Cross-Section of Expected Returns: An Empirical Assessment

Julian Thimme and Clemens Völkert

Journal of Business & Economic Statistics, 2015, vol. 33, issue 3, 418-429

Abstract: This article estimates and tests the smooth ambiguity model of Klibanoff, Marinacci, and Mukerji based on stock market data. We introduce a novel methodology to estimate the conditional expectation, which characterizes the impact of a decision maker's ambiguity attitude on asset prices. Our point estimates of the ambiguity parameter are between 25 and 60, whereas our risk aversion estimates are considerably lower. The substantial difference indicates that market participants are ambiguity averse. Furthermore, we evaluate if ambiguity aversion helps explaining the cross-section of expected returns. Compared with Epstein and Zin preferences, we find that incorporating ambiguity into the decision model improves the fit to the data while keeping relative risk aversion at more reasonable levels. Supplementary materials for this article are available online.

Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:taf:jnlbes:v:33:y:2015:i:3:p:418-429

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DOI: 10.1080/07350015.2014.958230

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