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Monetary policy rules and indterminacy

Sosunov, Kirill and Khramov, Vadim (2008): Monetary policy rules and indterminacy.

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Abstract

In recent papers it is shown that in the presence of price stickiness, investment and capital accumulation activity, active monetary policy (MP) rules can lead to indeterminacy under various assumptions about the structure of the model. We analyze the conditions for real indeterminacy to occur in the model with capital accumulation. The key assumption is that we add response to output to the monetary policy rule. In our paper we show that adding Current or Expected Output to MP rule substantially changes the conditions for real indeterminacy to occur. In contrast to some existing research we show that under current-looking with respect to output MP rules indeterminacy is almost impossible; under forward-looking with respect to output MP rules indeterminacy is almost impossible under active MP rules and very likely to occur under passive MP rules. We also show that stability conditions are almost not sensitive to changes in capital share in output and aggregate markup. We provide the nominal determinacy analysis and show that active and forward-looking MP rules with respect to output give

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