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On Identification of Bayesian DSGE Models

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  • Gary Koop
  • M. Hashem Pesaran
  • Ron P. Smith

Abstract

This article is concerned with local identification of individual parameters of dynamic stochastic general equilibrium (DSGE) models estimated by Bayesian methods. Identification is often judged by a comparison of the posterior distribution of a parameter with its prior. However, these can differ even when the parameter is not identified. Instead, we propose two Bayesian indicators of identification. The first follows a suggestion by Poirier of comparing the posterior density of the parameter of interest with the posterior expectation of its prior conditional on the remaining parameters. The second examines the rate at which the posterior precision of the parameter gets updated with the sample size, using data simulated at the parameter point of interest for an increasing sequence of sample sizes ( T). For identified parameters, the posterior precision increases at rate T . For parameters that are either unidentified or are weakly identified, the posterior precision may get updated but its rate of update will be slower than T . We use empirical examples to demonstrate that these methods are useful in practice. This article has online supplementary material.

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File URL: http://hdl.handle.net/10.1080/07350015.2013.773905
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Bibliographic Info

Article provided by Taylor & Francis Journals in its journal Journal of Business & Economic Statistics.

Volume (Year): 31 (2013)
Issue (Month): 3 (July)
Pages: 300-314

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Handle: RePEc:taf:jnlbes:v:31:y:2013:i:3:p:300-314

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  1. Marco Del Negro & Frank Schorfheide, 2006. "Forming priors for DSGE models (and how it affects the assessment of nominal rigidities)," Working Paper 2006-16, Federal Reserve Bank of Atlanta.
  2. Juan F. Rubio-Ram�rez & Daniel F. Waggoner & Tao Zha, 2010. "Structural Vector Autoregressions: Theory of Identification and Algorithms for Inference," Review of Economic Studies, Oxford University Press, vol. 77(2), pages 665-696.
  3. Pudney, S. E., 1982. "The identification of rational expectations models under structural neutrality," Journal of Economic Dynamics and Control, Elsevier, vol. 4(1), pages 117-121, November.
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Cited by:
  1. Pesaran, M. H. & Smith, R. P., 2011. "Beyond the DSGE straightjacket," Cambridge Working Papers in Economics 1138, Faculty of Economics, University of Cambridge.

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