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No. 225 Optimal Monetary Policy in an Operational Medium-Sized DSGE Model
by Malin Adolfson, Stefan Laséen, Jesper Lindé and Lars E.O. Svensson
 
august 2008
 
Abstract
We show how to construct optimal policy projections in Ramses, the Riksbank’s openeconomy medium-sized DSGE model for forecasting and policy analysis. Bayesian estimation of the parameters of the model indicates that they are relatively invariant to alternative policy assumptions and supports that the model may be regarded as structural in a stable low inflation environment. Past policy of the Riksbank until 2007:3 (the end of the sample used) is better explained as following a simple instrument rule than as optimal policy under commitment. We show and discuss the differences between policy projections for the estimated instrument rule and for optimal policy under commitment, under alternative definitions of the output gap, different initial values of the Lagrange multipliers representing policy in a timeless perspective, and different weights in the centralbank loss function.
 
JEL Classification
E52, E58
 
Keywords
Optimal monetary policy, instrument rules, optimal policy projections, openeconomy DSGE models
DOCUMENTATION
 
No. 225 Optimal Monetary Policy in an Operational Medium-Sized DSGE Model | 651 Kb
Technical Appendix | 337 Kb

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