System Reduction and the Accuracy of Solutions of DSGE Models: A Note
AbstractMany algorithms that provide approximate solutions for dynamic stochastic general equilibrium (DSGE) models employ the generalized Schur factorization since it allows for a flexible formulation of the model and exempts the researcher from identifying equations that give raise to infinite eigenvalues. We show, by means of an example, that the policy functions obtained by this approach may differ from those obtained from the solution of a properly reduced system. As a consequence, simulation results may depend on the numeric values of parameters that are theoretically irrelevant. The source of this inaccuracy are ill-conditioned matrices as they emerge, e.g., in models with strong habits. Therefore, researchers should always cross-check their results and test the accuracy of the solution.
Download InfoIf you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
Bibliographic InfoPaper provided by Universitaet Augsburg, Institute for Economics in its series Discussion Paper Series with number 320.
Date of creation: Dec 2012
Date of revision:
Contact details of provider:
Postal: Universitaetsstrasse 16, D-86159 Augsburg, Germany
Phone: +49 821 598 4060
Fax: +49 821 598 4217
Web page: http://www.wiwi.uni-augsburg.de/vwl/institut
More information through EDIRC
DSGE Models; Schur Factorization; System Reduction; Accuracy of Solutions;
Find related papers by JEL classification:
- C32 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models
- C63 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Computational Techniques
- E37 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Forecasting and Simulation: Models and Applications
This paper has been announced in the following NEP Reports:
- NEP-ALL-2013-01-07 (All new papers)
- NEP-CMP-2013-01-07 (Computational Economics)
- NEP-DGE-2013-01-07 (Dynamic General Equilibrium)
- NEP-ECM-2013-01-07 (Econometrics)
You can help add them by filling out this form.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Dr. Albrecht Bossert).
If references are entirely missing, you can add them using this form.