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American Economic Review: Vol. 102 No. 3 (May 2012)

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Market Prices of Risk with Diverse Beliefs, Learning, and Catastrophes

Article Citation

Cogley, Timothy, Thomas J. Sargent, and Viktor Tsyrennikov. 2012. "Market Prices of Risk with Diverse Beliefs, Learning, and Catastrophes." American Economic Review, 102(3): 141-46.

DOI: 10.1257/aer.102.3.141

Abstract

We compare market prices of risk in economies with identical patterns of endowments, priors, and information flows, but two different market structures, one with complete markets, another in which consumers can trade only a single risk-free bond. We study how opportunities to speculate, uncommon priors, and learning affect market prices of risk. Two types of consumers have diverse beliefs about the law of motion for a random exogenous endowment. One type knows the true law of motion while the other type learns about it via Bayes' theorem. Less-well-informed consumers are pessimistic, initially overestimating the probability of a catastrophic state. Learning dynamics and the wealth dynamics that they drive contribute to differences in evolutions of market prices of risk across market structures.

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Authors

Cogley, Timothy (NYU)
Sargent, Thomas J. (NYU and Hoover Institution, Stanford U)
Tsyrennikov, Viktor (Cornell U)

JEL Classifications

D81: Criteria for Decision-Making under Risk and Uncertainty
D83: Search; Learning; Information and Knowledge; Communication; Belief
D40: Market Structure and Pricing: General


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