In this paper we illustrate, using a simple model of monetary policy, the welfare costs of the private sector and/or the central bank being uncertain about the natural level of output. It turns out that monetary policy strategies that put less weight on output stabilisation can offset some of...

One of the problems facing policymakers is that recent releases of data are liable to subsequent revisions. This paper discusses how to deal with this, and is in two parts. In the normative part of the paper, we study the design of monetary policy rules in a model that has the feature that data...