Multiple-Solution Indeterminacies in Monetary Policy Analysis

Bennett McCallum

No 2003-E77, GSIA Working Papers from Carnegie Mellon University, Tepper School of Business

Abstract: This paper discusses four current topics in monetary policy analysis, each of which hinges on the possibility of multiple solutions in rational expectations (RE) models. In three of these cases-involving inflation forecast targeting, the zero-lower bound deflation trap, and the fiscal theory of the price level-analysis based on E-stability and adaptive learnability of the solutions suggests that only one of them is a viable equilibrium candidate. Thus the dangers alleged to prevail, in these cases, are not ones with which actual policymakers need to be concerned. In the case of the Taylor principle, by contrast, policy behavior that violates the principle is genuinely undesirable, since all of the RE equilibria fail to be learnable.

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Journal Article: Multiple-solution indeterminacies in monetary policy analysis (2003)
Working Paper: Multiple-Solution Indeterminacies in Monetary Policy Analysis (2003)
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