NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

Parameter Learning in General Equilibrium: The Asset Pricing Implications

Pierre Collin-Dufresne, Michael Johannes, Lars A. Lochstoer

NBER Working Paper No. 19705
Issued in December 2013
NBER Program(s):   AP   EFG

Parameter learning strongly amplifies the impact of macro shocks on marginal utility when the representative agent has a preference for early resolution of uncertainty. This occurs as rational belief updating generates subjective long-run consumption risks. We consider general equilibrium models with unknown parameters governing either long-run economic growth, the variance of shocks, rare events, or model selection. Overall, parameter learning generates long-lasting, quantitatively significant additional macro risks that help explain standard asset pricing puzzles.

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Document Object Identifier (DOI): 10.3386/w19705

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