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News versus sunspot shocks in a New Keynesian model

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  • Karnizova, Lilia

Abstract

Separately, news and sunspot shocks have been shown empirically to be determinants of changes in expectations. This paper considers both of them together in a simple New Keynesian monetary business cycle model. A full set of rational expectations solutions is derived analytically. The analytical characterization allows an explicit comparison of news about future monetary policy and sunspots. The key distinction between the shocks lies in their relation to the realized policy shock. If monetary policy is 'passive', both types of shocks affect model dynamics through forecast errors. The effect of the news on forecast errors is not unique, and the dynamics induced by news and sunspot shocks can be observationally equivalent. If monetary policy is 'active', the sunspots are irrelevant, and the model responses to the news shocks are unique. In both cases, news shocks strengthen the endogenous propagation of the model, since anticipation of future changes prolongs agents' reaction. --

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Bibliographic Info

Article provided by Kiel Institute for the World Economy in its journal Economics: The Open-Access, Open-Assessment E-Journal.

Volume (Year): 4 (2010)
Issue (Month): 19 ()
Pages: 1-27

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Handle: RePEc:zbw:ifweej:201019

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Keywords: News shocks; sunspots; expectations; monetary policy; indeterminacy;

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  1. Beaudry, Paul & Portier, Franck, 2001. "An Exploration into Pigou's Theory of Cycles," CEPR Discussion Papers 2996, C.E.P.R. Discussion Papers.
  2. Camilo E Tovar, 2008. "DSGE models and central banks," BIS Working Papers 258, Bank for International Settlements.
  3. John H. Cochrane, 1995. "What do the VARs Mean?: Measuring the Output Effects of Monetary Policy," NBER Working Papers 5154, National Bureau of Economic Research, Inc.
  4. Lubik, Thomas A. & Schorfheide, Frank, 2003. "Computing sunspot equilibria in linear rational expectations models," Journal of Economic Dynamics and Control, Elsevier, vol. 28(2), pages 273-285, November.
  5. Thomas Lubik & Frank Schorfheide, 2002. "Testing for Indeterminacy:An Application to U.S. Monetary Policy," Economics Working Paper Archive 480, The Johns Hopkins University,Department of Economics, revised Jun 2003.
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Cited by:
  1. Paul Beaudry & Franck Portier, 2013. "News Driven Business Cycles: Insights and Challenges," NBER Working Papers 19411, National Bureau of Economic Research, Inc.

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