"I describe two amplifications mechanisms that operate during liquidity crises and discuss the scope for central bank policies during crises as well as preventive policies in advance of crises. The first mechanism works through asset prices and balance sheets. A negative shock to the balance...

"In this paper we provide some evidence on when central banks have shifted from expansionary to contractionary monetary policy after a recession has ended-the exit strategy. We examine the relationship between the timing of changes in several instruments of monetary policy and the timing of...