CHOICE OF MONETARY POLICY INSTRUMENT WHEN THE FEEDBACK RULE ON PAST DISTURBANCES IS OPTIMALLY CHOSEN

Abstract

This paper investigates the optimal choice of monetary policy instrument when the feedback rule on past disturbances is optimally chosen. In the analysis, monetary feedback rule is based not only on current interest rate but also on past disturbances. In the neoclassical model where expectations are rational, the choice of monetary instrument can be redundant in stabilizing output. However, in the sticky price model and the model with adaptive expectations, the choice of monetary instrument in stabilizing output is the Pool's rule whether the feedback rule on past disturbances is optimally chosen or not. A crucial point in the analysis is that the price equation is forward-looking in the neoclassical model with rational expectations but is backward-looking in the sticky price model or the model with adaptive expectations.