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Can News Be a Major Source of Aggregate Fluctuations? A Bayesian DSGE Approach

  • Ippei Fujiwara

    (Institute for Monetary and Economic Studies, Bank of Japan (E-mail:

  • Yasuo Hirose

    (Economist, International Department, Bank of Japan (E-mail:

  • Mototsugu Shintani

    (Associate Professor, Department of Economics, Vanderbilt University, and Economist, Institute for Monetary and Economic Studies, Bank of Japan (E-mail:,

We examine whether the news shocks, as explored in Beaudry and Portier (2004), can be a major source of aggregate fluctuations. For this purpose, we extend a dynamic stochastic general equilibrium model, a la Christiano, Eichenbaum, and Evans (2005), by allowing news shocks on the total factor productivity and estimate the model using Bayesian methods. Estimation results on the Japanese and U.S. economies show that (1) the news shocks play an important role in business cycles; (2) a news shock with a longer forecast horizon has larger effects on nominal variables; and (3) the overall effect of the total factor productivity on hours worked becomes ambiguous in the presence of news shocks.

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Paper provided by Institute for Monetary and Economic Studies, Bank of Japan in its series IMES Discussion Paper Series with number 08-E-16.

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Date of creation: Jul 2008
Date of revision:
Handle: RePEc:ime:imedps:08-e-16
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