On the Completeness of Complete Markets

P.J.J. Herings; K.I.M. Rohde

doi:10.1007/s00199-007-0291-y

On the Completeness of Complete Markets

P.J.J. Herings^*, K.I.M. Rohde

^*Corresponding author for this work

Microeconomics & Public Economics

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Abstract

We reconsider the allocational invariance of equilibria to different formulations of market completeness. We identify the so-far neglected assumption of sophisticated behavior as being crucial. First, the arrow–debreu setting is considered, where markets do not reopen in the future. Second, sequentially complete markets are analyzed, where goods on the spot markets and all contingent one-period ahead commodities can be traded in every state. Finally, complete markets are analyzed, where all possible contingent commodities can be traded at every state. Preferences may be time-consistent or time-inconsistent. A distinction is made between naïve and sophisticated behavior.

Original language	English
Pages (from-to)	171-202
Number of pages	31
Journal	Economic Theory
Volume	37
DOIs	https://doi.org/10.1007/s00199-007-0291-y
Publication status	Published - 1 Jan 2008

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title = "On the Completeness of Complete Markets",

abstract = "We reconsider the allocational invariance of equilibria to different formulations of market completeness. We identify the so-far neglected assumption of sophisticated behavior as being crucial. First, the arrow–debreu setting is considered, where markets do not reopen in the future. Second, sequentially complete markets are analyzed, where goods on the spot markets and all contingent one-period ahead commodities can be traded in every state. Finally, complete markets are analyzed, where all possible contingent commodities can be traded at every state. Preferences may be time-consistent or time-inconsistent. A distinction is made between na{\"i}ve and sophisticated behavior.",

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AB - We reconsider the allocational invariance of equilibria to different formulations of market completeness. We identify the so-far neglected assumption of sophisticated behavior as being crucial. First, the arrow–debreu setting is considered, where markets do not reopen in the future. Second, sequentially complete markets are analyzed, where goods on the spot markets and all contingent one-period ahead commodities can be traded in every state. Finally, complete markets are analyzed, where all possible contingent commodities can be traded at every state. Preferences may be time-consistent or time-inconsistent. A distinction is made between naïve and sophisticated behavior.

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On the Completeness of Complete Markets

Abstract

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