Staff Reports
An Investigation of the Gains from Commitment in Monetary Policy
August 2003 Number 171
JEL classification: E52, E58, E61

Authors: Ernst Schaumburg and AndreaTambalotti

This paper proposes a simple framework for analyzing a continuum of monetary policy rules characterized by differing degrees of credibility, in which commitment and discretion become special cases of what we call quasi commitment. The monetary policy authority is assumed to formulate optimal commitment plans, to be tempted to renege on them, and to succumb to this temptation with a constant exogenous probability known to the private sector. By interpreting this probability as a continuous measure of the (lack of) credibility of the monetary policy authority, we investigate the welfare effect of a marginal increase in credibility. Our main finding is that, in a simple model of the monetary transmission mechanism, most of the gains from commitment accrue at relatively low levels of credibility.

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For a published version of this report, see Ernst Schaumburg and Andrea Tambalotti, "An Investigation of the Gains from Commitment in Monetary Policy," Journal of Monetary Economics 54, no. 2 (March 2007): 302-24.