This paper is an attempt to provide an updated assessment of what we know and what do not know about the impact of monetary policy on the economy and what implications follow for the conduct of monetary policy in today's world. Firstly, we discuss the conditions under which monetary policy can...

This document contains the text of the 1998 Central Banking Lecture delivered at the London School of Economics and Political Science on June 4th. It starts by asking what factors have been behind the remarkable retreat of inflation that has taken place internationally since the mid-eighties,...