The 6D bias and the equity premium puzzle
By: Xavier Gabaix [and] David Laibson
Contributors: Laibson, David I.; Massachusetts Institute of Technology. Dept. of Economics
Series: Working paper series / Massachusetts Institute of Technology, Dept. of Economics -- working paper 02-01; Working paper (Massachusetts Institute of Technology. Dept. of Economics) -- no. 02-01.
Publisher: Massachusetts Institute of Technology, Dept. of Economics
Published: 2001
Place of publication: Cambridge, MA
Language: eng
Number of pages: 39
Description: If decision costs lead agents to update consumption every D periods, then econometricians will find an anomalously low correlation between equity returns and consumption growth (Lynch 1996). We analytically characterize the dynamic properties of an economy composed of consumers who have such delayed updating. In our setting, an econometrician using an Euler equation procedure would infer a coefficient of relative risk aversion biased up by a factor of 6D. Hence with quarterly data, if agents adjust their consumption every D = 4 quarters, the imputed coefficient of relative risk aversion will be 24 times greater than the true value. High levels of risk aversion implied by the equity premium and violations of the Hansen-Jagannathan bounds cease to be puzzles. The neoclassical model with delayed adjustment explains the consumption behavior of shareholders. Once limited participation is taken into account, the model matches most properties of aggregate consumption and equity returns, including new evidence that the covariance between lnC(t+h)/lnC(t) and R(t+1) slowly rises with h. Keywords: 6D, bounded rationality, decision costs, delayed adjustment, equity premium puzzle. JEL Classification: E44, G1.
Notes: "June 2001."; "Current draft: June 24, 2001. First draft: August 15, 2000"--Abstract.

Includes bibliographical references (p. 36-39).

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