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Schabert, Andreas
Year of Publication: 
Series/Report no.: 
Tinbergen Institute Discussion Paper 05-059/2
In this paper, we analyze the relation between interest rate targets and money supply in a (bubble-free) rational expectations equilibrium of a standard cash-in-advance model. We examine lump-sum injections of money aimed to implement interest rate sequences that satisfy interest rate target rules. An interest rate target with a positive inflation feedback in general corresponds to money growth rates rising with inflation. When prices are not completely flexible, this implies that a non-destabilizing money supply cannot implement a forward-looking and active interest rate rule. This principle also applies for an alternative model version with an interest elastic money demand. The implementation of a Taylor-rule then requires money injections that lead to explosive or oscillatory equilibrium sequences. In contrast, an inertial interest rate target can be implemented by a non-destabilizing money supply, even if the inflation feedback exceeds one, which is often found in interest rate rule regressions.
Interest rate rules
contingent money supply
macroeconomic stability
policy equivalence
interest rate inertia
Document Type: 
Working Paper

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