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The quantity theory of money (often abbreviated QTM) is a hypothesis within monetary economics which states that the general price level of goods and services is directly proportional to the amount of money in circulation (i.e., the money supply), and that the causality runs from money to prices. This implies that the theory potentially ...
The Cambridge equation formally represents the Cambridge cash-balance theory, an alternative approach to the classical quantity theory of money. Both quantity theories, Cambridge and classical, attempt to express a relationship among the amount of goods produced , the price level , amounts of money, and how money moves.
That is to say that, if and were constant or growing at equal fixed rates, then the inflation rate would exactly equal the growth rate of the money supply. An opponent of the quantity theory would not be bound to reject the equation of exchange, but could instead postulate offsetting responses (direct or indirect) of or of to /.
According to the quantity theory supported by the monetarist school of thought, there is a tight causal connection between growth in the money supply and inflation. In particular during the 1970s and 1980s this idea was influential, and several major central banks during that period attempted to control the money supply closely, following a ...
Friedman's exogenous money supply theory has been deeply criticized by British Post-Keynesian economist Nicholas Kaldor in the 1970s. While Friedman and monetarist economists claimed that the money supply was exogenously created by a powerful central bank, Kaldor claimed that the money was created by second-tier banks through the distribution ...
The most basic "classical" transaction motive can be illustrated with reference to the Quantity Theory of Money. [1] According to the equation of exchange MV = PY, where M is the stock of money, V is its velocity (how many times a unit of money turns over during a period of time), P is the price level and Y is real income.
His major contributions related to the quantity theory and the trade cycle. [7] He was one of the first English economists to stress the primacy of credit money rather than metallic legal tender. Furthermore, his income-based approach led to a closer integration of the theories of money and output.
For example, the velocity of money is defined as nominal GDP / nominal money supply; it has units of (dollars / year) / dollars = 1/year. In discrete time , the change in a stock variable from one point in time to another point in time one time unit later (the first difference of the stock) is equal to the corresponding flow variable per unit ...