We argue that discretionary monetary policy exposes the economy to welfare-decreasing instability. It does so by creating the potential for private expectations about the response of monetary policy to exogenous shocks to be self-fulfilling. Among the many equilibria that are possible, some have good welfare properties. But, others exhibit welfare decreasing volatility in output and employment. We refer to the latter type of equilibria as expectation traps. In effect, our paper presents a new argument for commitment in monetary policy because commitment eliminates these bad equilibria. We show that full commitment is not necessary to achieve the best outcome, and that more limited forms of commitment suffice.
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Length: Date of creation: 1996 Date of revision: Publication status: Published in Monetary Policy: Measurement and Management : a conference (1996: March 1) ; Journal of Economic Theory, August 1998, Vol. 81, no. 2, p 462-492 Handle: RePEc:fip:fedfap:96-04
References listed on IDEAS Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
Chari, V V & Kehoe, Patrick J, 1990.
"Sustainable Plans,"
Journal of Political Economy,
University of Chicago Press, vol. 98(4), pages 783-802, August.
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V.V. Chari & Patrick J. Kehoe, 1989.
"Sustainable plans,"
Staff Report
122, Federal Reserve Bank of Minneapolis.
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Cited by: (explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.) This item has more than 25 citations. To prevent cluttering this page, these citations are listed on a separate page.