Farmer, Waggoner, and Zha (2009) show that a new Keynesian model with a regime-switching monetary policy rule can support multiple solutions that depend only on the fundamental shocks in the model. Their note appears to find solutions in regions of the parameter space where there should be no bounded solutions, according to conditions in Davig and Leeper (2007). This puzzling finding is straightforward to explain: Farmer, Waggoner, and Zha (FWZ) derive solutions using a model that differs from the one to which the Davig and Leeper (DL) conditions apply. In addition, FWZ impose cross-equation restrictions between behavioral relations and the exogenous driving process. This rather special assumption undermines the traditional sharp distinction in micro-founded general equilibrium models between 'deep' parameters and the parameters governing the exogenous processes.
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Paper provided by Federal Reserve Bank of Kansas City in its series Research Working Paper with number
RWP 09-09.
References listed on IDEAS Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
Troy Davig & Eric M. Leeper, 2006.
"Endogenous Monetary Policy Regime Change,"
Caepr Working Papers
2006-002, Center for Applied Economics and Policy Research, Economics Department, Indiana University Bloomington.
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Troy Davig & Eric M. Leeper, 2008.
"Endogenous Monetary Policy Regime Change,"
NBER Chapters,
in: NBER International Seminar on Macroeconomics 2006, pages 345-391
National Bureau of Economic Research, Inc.
[Downloadable!]
David Andolfatto & Paul Gomme, 2003.
"Monetary Policy Regimes and Beliefs,"
International Economic Review,
Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 44(1), pages 1-30, February.
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