QUANTITY THEORY OF MONEY: A theory that states a given percentage change in the money supply leads to an equal percentage change in nominal gross domestic product. This theory is derived from the equation of exchange and is a cornerstone of the monetarists view of macroeconomics. A key assumption in translating the equation of exchange to the quantity theory of money is that the velocity of money is constant (or unaffected by the other key variables--output, price level, and money supply). See also | money | money supply | monetarism | equation of exchange | Keynesian economics | classical economics | gross domestic product | macroeconomics | price level |
