In the face of the recent financial crisis, central banks have varied the size and structure of their balance sheets. Such actions attempt to exploit additional instruments of central bank policy that go beyond the traditional monetary policy instrument (ie control over the shortterm interest...

Central bank balance sheets swelled in size in response to the financial crisis of 2007-09. In this article we discuss what makes them different from the balance sheets of other institutions, how they've been used in the past, and how they might evolve in the future as means to implement novel...