This paper studies the implications for general equilibrium asset pricing of a recently introduced class of Kreps-Porteus non-expected utility preferences, which is characterized by a constant intertemporal elasticity of substitution and a constant, but unrelated, coefficient of relative risk aversion. It is shown that the solution to the "equity premium puzzle" documented by Mehra and Prescott [19851 cannot be found, for plausibly calibrated parameter values, by simply separating risk aversion from intertemporal substitution. Rather, relaxing the parametric restriction on tastes implicit in the time-addictive expected utility specification and adopting Kreps-Porteus preferences in the direction of "more realism" is likely to add a "riskfree rate puzzle" to Mehra's and Prescott's "equity premium puzzle."
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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number
2829.
Length: Date of creation: Jan 1989 Date of revision: Publication status: Published as "The Equity Premium Puzzle and the Risk-Free Rate Puzzle", Journal of Monetary Economics, Vol. 24, no. 3 (1989): 401-422. Handle: RePEc:nbr:nberwo:2829
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