"Realizing that their traditional instruments were inadequate for responding to the crisis that began on 9 August 2007, Federal Reserve officials improvised. Beginning in mid-December 2007, they implemented a series of changes directed at ensuring that liquidity would be distributed to those...

"While many analyses of monetary policy consider only a target for a short-term nominal interest rate, other dimensions of policy have recently been of greater importance: changes in the supply of bank reserves, changes in the assets acquired by central banks, and changes in the interest rate...