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Incomplete information and self-fulfilling prophecies

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Pengfei Wang
Yi Wen

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Abstract

This paper shows that incomplete information can be a rich source of sunspots equilibria. This is demonstrated in a standard dynamic general equilibrium model of monopolistic competition … la Dixit-Stiglitz. In the absence of fundamental shocks, the model has a unique certainty (fundamental) equilibrium, but there are also multiple stochastic (sunspots) equilibria that are not mere randomizations over fundamental equilibria. In other words, sunspots can exist in infinite-horizon dynamic models with a unique saddle path steady state. In contrast to the recent sunspots literature (e.g., Benhabib and Farmer 1994), sunspots arising under incomplete information can be serially correlated and are robust to parameters associated with production technologies and preferences. Markup is always countercyclical in sunspots equilibria (which is consistent with empirical evidence) and fluctuations driven by sunspots look very similar to fluctuations driven by technology shocks.

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Paper provided by Federal Reserve Bank of St. Louis in its series Working Papers with number 2007-033.

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Date of creation: 2007
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Handle: RePEc:fip:fedlwp:2007-033

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Keywords: Business cycles Prices

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