Economic Quarterly

Spring 1996

Limits on Interest Rate Rules in the IS Model

Robert G. King and William Kerr

There are a few limits on interest rate rules in the textbook sticky price macroeconomic model. A central bank can even use a 'pure' rule that sets the interest rate arbitrarily. However, modern consumption and investment theory suggests that expectations of future output enter the IS schedule. With this modification, a pure interest rate rule is either infeasible or undesirable. Yet, interest rate rules that target the price level or the inflation rate can be feasible.



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