The Informational Eff ect of Monetary Policy and the Case for Policy Commitment Chengcheng Jia I explore how asymmetric information between the central bank and the private sector changes the optimal conduct of monetary policy. I build a New Keynesian model in which private agents have imperfect information about underlying shocks, while the central bank has perfect information. In this environment, private agents extract information about the underlying shocks from the central bank's interest-rate decisions. This informational eff ect weakens the direct eff ect of monetary policy: When the central bank adjusts the interest rate to off set the eff ects of underlying shocks, the interest rate also reveals information about the realization of underlying shocks. Because private agents have more precise information about the shocks and consequently react more aggressively to it, the economy becomes harder to stabilize with monetary policy. I show that committing to the optimal state-contingent policy rule alleviates this problem by controlling the information revealed through the interest rate.
We study the implications of the Fed's new policy framework of average inflation targeting (AIT) and its ambiguous communication. The central bank has the incentive to deviate from its announced AIT and implement inflation targeting ex post to maximize social welfare. We show two motives for ambiguous communication about the horizon over which the central bank averages inflation as a result of time inconsistency. First, it is optimal for the central bank to announce different horizons depending on the state of the economy. Second, ambiguous communication helps the central bank gain credibility.
We study the implications of the Fed's new policy framework of average inflation targeting (AIT) and its ambiguous communication. We show that AIT improves the trade-off between inflation and real activity by tilting the Phillips curve in a favorable way. To fully utilize this feature and maximize social welfare, the central bank has the incentive to deviate from AIT and implement inflation targeting ex post. Next, we rationalize the central bank's ambiguous communication about the horizon over which it averages inflation. Ambiguous communication, together with uncertainty about economic fundamentals, helps the central bank to gain credibility and improve welfare in the long run, in spite of the time-inconsistent nature of AIT.
As the Federal Reserve has become more transparent about its decisions on the federal funds target rate, the general public has begun to regard the rate as not only a benchmark interest rate, but also as a signal about the state of the economy. However, the specific information considered by the public to be revealed is not clearly understood. We investigate this question and find that the information revealed by monetary policy decisions is regarding future output growth, not inflation, and that such an information effect is theoretically optimal and does not make interest-rate policies self-defeating.
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