The paper studies the conduct of monetary policy, in a simple new Keynesian model, with adaptive learning on the part of the private sector. A key feature is that even though we start out with a linear “structural†model, the system and hence policy responses inherit the non-linear feature of the updating equations for the estimated parameters. In the paper, we contrast two different monetary policy regimes. In the first the central bank follows a simple rule, which comes from the first order conditions, for optimal policy under discretion in the case of rational expectations. In the second, the central bank has full information about the structure of the economy, including the adaptive learning mechanism. It takes the expectations formation mechanism explicitly into account when deriving optimal policy. This framework allows an explicit discussion of the importance of keeping inflation expectations under control. We illustrate with an application to a regime change, where we assume that the incumbent policymaker did not take the learning into account and allowed the expectation formation process to become unhinged. However, before inflation expectations (and actual inflation) spirals out of control, we assume that a sophisticated central banker, who does take the effect of learning into account, takes charge and study how the economy adjusts after the regime change. Under our assumptions the transition is slow. We claim that some features of the transition match important stylised facts associated with the Volcker disinflation in the US. In the end the fully optimal policy delivers less inflation and output gap volatility. It does so by anchoring inflation expectations thereby contributing to the overall stability of the economy. To achieve this result optimal policy is conditional on the degree of perceived persistence. As perceived persistence increases so does inertia in the policy response in the face of inflation shocks. We compare the contrast between the two policy regimes in the paper with the difference between the rational expectations under discretion and commitment.
Download Info
To download:
If you experience problems downloading a file, check if you have the
proper application to
view it first. Information about this may be contained
in the File-Format links below. In case of further problems read
the IDEAS help
page. Note that these files are not on the IDEAS
site. Please be patient as the files may be large.
Find related papers by JEL classification: E5 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy E65 - Macroeconomics and Monetary Economics - - Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook - - - Studies of Particular Policy Episodes
This paper has been announced in the following NEP Reports:
References listed on IDEAS Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
Cited by: (explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.)