The year 2013 marks the 100th anniversaries of two separate major institutional innovations in American economic policy: the Constitutional Amendment enacting the federal income tax, ratified on February 3, 1913, and the law establishing the Federal Reserve, passed in December 1913.
It took some time before the two new institutions became associated with the explicit concepts of fiscal policy and monetary policy, respectively. It wasn’t until after the experience of the 1930s that they came to be viewed as potential instruments for managing the macro-economy. John Maynard Keynes, of course, pointed out the advantages of expansionary fiscal policy in circumstances like the Great Depression. Milton Friedman blamed the Depression on the Fed for allowing the money supply to fall. [Tools of fiscal policy used by governments, in addition to tax rates and tax deductions, are spending and transfers. Tools of monetary policy used by central banks include interest rates, quantities of money and credit, and instruments such as reserve requirements and foreign exchange intervention used in various (non-US) countries.]