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Coordination and Policy Traps

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Author Info
George-Marios Angeletos
Christian Hellwig
Alessandro Pavan

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Abstract

This paper examines the ability of a policy maker to control equilibrium outcomes in an environment where market participants play a coordination game with information heterogeneity. We consider defense policies against speculative currency attacks in a model where speculators observe the fundamentals with idiosyncratic noise. The policy maker is willing to take a costly policy action only for moderate fundamentals. Market participants can use this information to coordinate on di.erent responses to the same policy action, thus resulting in policy traps, where the devaluation outcome and the shape of the optimal policy are dictated by self-fulfilling market expectations. Despite equilibrium multiplicity, robust policy predictions can be made. The probability of devaluation is monotonic in the fundamentals, the policy maker adopts a costly defense measure only for a small region of moderate fundamentals, and this region shrinks as the information in the market becomes precise.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 9767.

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Date of creation: Jun 2003
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Handle: RePEc:nbr:nberwo:9767

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Find related papers by JEL classification:
C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information

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