Habit Formation, Incomplete Markets, and the Significance of Regional Risk for Expected Returns

George M. Korniotis

The Review of Financial Studies, 2008, vol. 21, issue 5, 2139-2172

Abstract: This paper introduces a consumption-based capital asset pricing model (CCAPM) that combines undiversifiable income shocks and external habit formation. Using US state-level data, the paper provides realistic estimates for preference parameters when the external habit of the state investors is based on the consumption of the four Census regions. The model also implies four asset pricing factors: the cross-sectional means of consumption growth and habit growth (capturing national systematic risk) and the cross-sectional variances of consumption growth and habit growth (capturing regional systematic risk). This four-factor model has greater power in explaining expected returns than the CCAPM described in Breeden (1979). , Oxford University Press.

Date: 2008
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