The recent global financial crisis has led central banks to rely heavily on "unconventional" monetary policies. This alternative approach to policy has generated much discussion and a heated and at times confusing debate. The debate has been complicated by the use of different definitions and...

The major Central Banks have cut their key rates sharply in recent months in response to the rapid slowdown in the economy. These conventional monetary policies have shown their limitations, however. In the first place, central banks have little room for manoeuvre: Target rates are now between 0...