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Back to square one: Identification issues in DSGE models

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  • Fabio Canova

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  • Luca Sala

Abstract

We investigate identifiability issues in DSGE models and their consequences for parameter estimation and model evaluation when the objective function measures the distance between estimated and model impulse responses. We show that observational equivalence, partial and weak identification problems are widespread, that they lead to biased estimates, unreliable t-statistics and may induce investigators to select false models. We examine whether different objective functions affect identification and study how small samples interact with parameters and shock identification. We provide diagnostics and tests to detect identification failures and apply them to a state-of-the-art model.

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Bibliographic Info

Paper provided by Department of Economics and Business, Universitat Pompeu Fabra in its series Economics Working Papers with number 927.

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Date of creation: May 2005
Date of revision: Sep 2006
Handle: RePEc:upf:upfgen:927

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Web page: http://www.econ.upf.edu/

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Keywords: Identification; Impulse Responses; DSGE models; small samples;

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