Price Level Determinacy with an Interest Rate Policy Rule and Rational Expectations

Working Paper: NBER ID: w0559

Authors: Bennett T. McCallum

Abstract: This paper reconsiders a result obtained by Sargent and Wallace, namely, that price level indeterminacy obtains in their well-known model if the monetary authorities adopt a policy feedback rule for the interest rate rather than the money stock. Since the Federal Reserve seems often to have used the federal funds rate as its operating instrument, with the money stack determined by the quantity demanded, this result suggests that the Sargent-Wallace model -- as well as others incorporating rational expectations -- is inconsistent with U.S. experience. It is here shown, however, that the indeterminacy result vanishes if the interest rate rule is chosen so as to have some desired effect on the expected quantity of money demanded. This revised conclusion holds even if considerable weight is given, in the choice of a rule, to the aim of smoothing interest rate fluctuations.

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Causal Claims Network Graph

Edges that are evidenced by causal inference methods are in orange, and the rest are in light blue.


Causal Claims

CauseEffect
Interest rate rule (E43)expected money demand (E41)
expected money demand (E41)price level (E30)
Interest rate rule (without regard to money demand) (E43)price level indeterminacy (E30)
Interest rate rule (designed to impact money demand) (E43)price level determinacy (E30)

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