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...

This paper studies optimal robust monetary policy when the central bank imperfectly observes potential output and has Knightian uncertainty about the intertemporal elasticity of substitution and the slope of the Phillips curve. The literature on optimal robust monetary policy has focused on...