Author(s):	Seppo Honkapohja, Kaushik Mitra
Publication Date:	December 2003
Keyword(s):	indeterminacy, inertia in demand, inflation inertia, inflation targeting, instability under learning
JEL(s):	E32, E52, E61
Programme Areas:	International Macroeconomics
Link to this Page:	cepr.org/active/publications/discussion_papers/dp.php?dpno=4126

Monetary policy is sometimes formulated in terms of a target level of inflation, a fixed time horizon and a constant interest rate that is anticipated to achieve the target at the specified horizon. These requirements lead to constant interest rate (CIR) instrument rules. Using the standard New Keynesian model, it is shown that some forms of CIR policy lead to both indeterminacy of equilibria and instability under adaptive learning. Some other forms of CIR policy perform better, however. We also examine the properties of the different policy rules in the presence of inertial demand and price behaviour.