Econometrica

Journal Of The Econometric Society

An International Society for the Advancement of Economic
Theory in its Relation to Statistics and Mathematics

Edited by: Guido W. Imbens • Print ISSN: 0012-9682 • Online ISSN: 1468-0262

Econometrica: Sep, 2005, Volume 73, Issue 5

The Optimal Degree of Discretion in Monetary Policy

https://doi.org/10.1111/j.1468-0262.2005.00626.x
p. 1431-1475

Susan Athey, Andrew Atkeson, Patrick J. Kehoe

How much discretion should the monetary authority have in setting its policy? This question is analyzed in an economy with an agreed‐upon social welfare function that depends on the economy's randomly fluctuating state. The monetary authority has private information about that state. Well designed rules trade off society's desire to give the monetary authority discretion to react to its against society's need to prevent that authority from giving in to the temptation to stimulate the economy with unexpected inflation, the problem. Although this dynamic mechanism design problem seems complex, its solution is simple: legislate an inflation cap. The optimal degree of monetary policy discretion turns out to shrink as the severity of the time inconsistency problem increases relative to the importance of private information. In an economy with a severe time inconsistency problem and unimportant private information, the optimal degree of discretion is none.


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