Optimal inflation policy

This paper considers the problem of optimal long-run monetary policy. It shows that optimal inflation policy involves trading off two quite different considerations. First, increases in the rate of inflation tax the holding of many balances, leading to a deadweight loss as excessive resources are devoted to economizing on cash balances. Second, increases in the rate of inflation raise capital intensity. As long as the economy has a capital stock short of the golden rule level, increases in capital intensity raise the level of consumption. Ignoring the second consideration leads to the common recommendation that the money growth rate be set so that the nominal interest rate is zero. Taking it into account can lead to significant modifications in the ‘full liquidity rule’. Interactions of inflation policy with financial intermediation and taxation are also considered. The results taken together suggest that inflation can have important welfare effects, and that optimal inflation policy is an empirical question, which depends on the structure of the economy.