An increase in inflation causes people to hold smaller real balances and to speed up their spending. Virtually all monetary models capture the first—inflation tax—effect. Few capture the second—hot potato—effect. Those that do associate negative welfare consequences with the hot potato effect. Because both the inflation tax and the hot potato effect imply that inflation has negative effects on welfare, an optimal monetary policy is characterized by the Friedman rule. In the model presented here, there is a hot potato effect, but—all else held constant—the hot potato effect has positive consequences for welfare. As a result, a departure from the Friedman rule can be socially desirable.
