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The Performance and Robustness of Simple Monetary Policy Rules in Models of the Canadian Economy

Denise Côté (), John Kuszczak, Jean-Paul Lam (), Ying Liu and Pierre St-Amant ()

Technical Reports from Bank of Canada

Abstract: In this report, we evaluate several simple monetary policy rules in twelve private and public sector models of the Canadian economy. Our results indicate that none of the simple policy rules we examined is robust to model uncertainty, in that no single rule performs well in all models. In fact, our results show that the performance of some of the simple rules, particularly interest-rate-smoothing rules and rules that have a high coefficient on the inflation gap, can substantially deviate from the optimal rule and can even be unstable in some models. Our results are thus very different from those of Levin, Wieland, and Williams (1999), who argue that simple policy rules are not only robust but also generate essentially the same policy frontier as more complicated rules or rules that respond to a large number of variables. Furthermore, we find that open-economy rules do not perform well in many models. In fact, we find that adding an exchange rate term to a simple policy rule often increases the loss-function value. This result is thus very different from that of Ball (1999), who argues in favour of a rule that includes the exchange rate. Although it is not robust, we find that a simple nominal Taylor-type rule that has a coefficient of 2 on the inflation gap and 0.5 on the output gap outperforms the other simple rules in a certain class of models. But even in those models the loss-function value of this simple rule can substantially deviate from the optimal or base-case rule.

Keywords: Uncertainty; and; monetary; policy (search for similar items in EconPapers)
JEL-codes: E52 E58 (search for similar items in EconPapers)
Date: 2002
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