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Out of equilibrium dynamics with decentralized exchange cautious trading and convergence to efficiency
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Ghosal, Sayantan and Porter, James A. (2010) Out of equilibrium dynamics with decentralized exchange cautious trading and convergence to efficiency. Working Paper. Coventry: University of Warwick. Dept. of Economics. Warwick economics research paper series (TWERPS), Vol.2010 (No.928).
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Abstract
Is the result that equilibrium trading outcomes are efficient in markets without frictions robust to a scenario where agents' beliefs and plans aren't already aligned at their equilibrium values? In this paper, starting from a situation where agents' beliefs and plans aren't already aligned at their equilibrium values, we study whether out of equilibrium trading converges to efficient allocations. We show that out-of-equilibrium trading does converge with probability 1 to an efficient allocation even when traders have limited information and trade cautiously. In economies where preferences can be represented by Cobb-Douglass utility functions, we show, numerically, that the rate of convergence will be exponential. We show that experimentation leads to convergence in some examples where multilateral exchange is essential to achieve gains from trade. We prove that experimentation does converge with probability 1 to an efficient allocation and the speed of convergence remains exponential with Cobb-Douglass utility functions.
| Item Type: | Working or Discussion Paper (Working Paper) | ||||
|---|---|---|---|---|---|
| Subjects: | H Social Sciences > HB Economic Theory | ||||
| Divisions: | Faculty of Social Sciences > Economics | ||||
| Library of Congress Subject Headings (LCSH): | Equilibrium (Economics), Business -- Mathematical models, Efficient market theory | ||||
| Series Name: | Warwick economics research paper series (TWERPS) | ||||
| Publisher: | University of Warwick. Dept. of Economics | ||||
| Place of Publication: | Coventry | ||||
| Official Date: | 2010 | ||||
| Dates: |
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| Volume: | Vol.2010 | ||||
| Number: | No.928 | ||||
| Status: | Not Peer Reviewed | ||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) |
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