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Asymmetric expectation effects of regime shifts and the Great Moderation

  • Zheng Liu
  • Daniel F. Waggoner
  • Tao Zha

We assess the quantitative importance of the expectation effects of regime shifts in monetary policy in a DSGE model that allows the monetary policy rule to switch between a ?bad? regime and a ?good? regime. When agents take into account such regime shifts in forming expectations, the expectation effect is asymmetric across regimes. In the good regime, the expectation effect is small despite agents? disbelief that the regime will last forever. In the bad regime, however, the expectation effect on equilibrium dynamics of inflation and output is quantitatively important, even if agents put a small probability that monetary policy will switch to the good regime. Although the expectation effect dampens aggregate fluctuations in the bad regime, a switch from the bad regime to the good regime can still substantially reduce the volatility of both inflation and output, provided that we allow some ?reduced-form? parameters in the private sector to change with monetary policy regime. Much of the volatility reduction is attributed to a structural break in the persistence of equilibrium dynamics of macroeconomic variables.

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Paper provided by Federal Reserve Bank of Minneapolis in its series Working Papers with number 653.

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Date of creation: 2007
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Handle: RePEc:fip:fedmwp:653
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