Helmand Province has a capital.
In monetary economics , the quantity theory of money -LRB- QTM -RRB- states that the general price level of goods and services is directly proportional to the amount of money in circulation , or money supply .. monetary economics. monetary economics. money supply. money supply. The theory was challenged by Keynesian economics , but updated and reinvigorated by the monetarist school of economics .. Keynesian economics. Keynesian economics. the monetarist school of economics. Monetarism. While mainstream economists agree that the quantity theory holds true in the long run , there is still disagreement about its applicability in the short run .. long run. long run. short run. short run. Critics of the theory argue that money velocity is not stable and , in the short-run , prices are sticky , so the direct relationship between money supply and price level does not hold .. money supply. money supply. money velocity. money velocity. sticky. stick prices. Alternative theories include the real bills doctrine and the more recent fiscal theory of the price level .. real bills doctrine. real bills doctrine. fiscal theory of the price level. fiscal theory of the price level