What drives stochastic risk aversion

What drives stochastic risk aversion
Document type
Working Paper
Cho, Sungjun
Manchester Business School
Date of publication
18 September 2009
University of Manchester Business School Working Papers. No. 585
Trends: economic, social and technology trends affecting business, Management & leadership: including strategy, public sector management, operations and production
Business and management
Material type

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This paper examines determinants of stochastic relative risk aversion in conditional asset pricing models. It first develops time-series specification tests with nonlinear state-space models with heteroskedasticity based on Merton (1973)'s ICAPM. It then establishes the following facts. First, the surplus consumption ratio implied by the external habit formation model is the most important determinant of relative risk aversion. Second, the CAY of Lettau and Ludvigson (2001a) without a look-ahead bias explains part of relative risk aversion, and the short term interest rate has some explanatory power for hedging components. Finally, the selected models from extensive time-series analysis are at least comparable to, or better than, the Fama-French three-factor model in explaining the value premium and the cross-section of industry portfolios.

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