Norges Bank

Working Paper

Robustifying optimal monetary policy using simple rules as cross-checks

Author:
Pelin Ilbas, Øistein Røisland and Tommy Sveen
Series:
Working Paper
Number:
22/2012

Abstract
There are two main approaches to modelling monetary policy; simple instrument rules and optimal policy. We propose an alternative that combines the two by extending the loss function with a term penalizing deviations from a simple rule. We analyze the properties of the modified loss function by considering three different models for the US economy. The choice of the weight on the simple rule determines the trade-off between optimality and robustness. We show that by placing some weight on a simple Taylor-type rule in the loss function, one can prevent disastrous outcomes if the model is not a correct representation of the underlying economy.

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ISSN 1502-8190 (online)

Published 19 December 2012 09:30
Published 19 December 2012 09:30