The ratio of the level of aggregate expenditure at current market prices in the economy
to the average money stock in a given year is known as the ‘velocity circulation of money’.
In other words, it is the speed at which the money changes hand in a given financial year.
When the country’s GDP grows faster than the increase in the money supply, velocity
increases and vise versa. The concept of money velocity started with the equation,
MV=PT
where, M is the total quantity of money in circulation, V stands for the velocity of money,
P refers to the general price level, and T is the total volume of transactions of goods and
services against money. Due to the problem of non-availability of data the term T was
latter replace by Q so the equation becomes,
MV=PQ
Q is assumed to be full employment level and V is an institutional Constant, a direct
relation between exogenously given money supply (M) and price level (P) is postulated.
Keynesian and quantity theories are two competing theories of aggregate money
demand. The monetarists think that the stability of income velocity of money (V) is
important, whereas the Keynesians have criticized the stability velocity of money.
According to Keynes, under the conditions of unemployment equilibrium V was highly
unstable. The Quantity Theory of money is often associated with the assumption of a
constant V that is something as a natural constant. This is not fully correct. No doubt,
the transactions approach emphasizes payment practice such as the frequency with which
people are being paid. The irregularity of receipts and payments is its key determinant. But
Fisher and earlier quantity theorist did explicitly recognize that velocity would also be
affected by the other things such as the high interest rates and also the rate of change
of prices. They recognized that both the high rate of interest and rapidly rising prices
would induce people to economies on money balances and so tend to raise velocity and
that low interest rate and falling prices would have the opposite effect. Therefore it was
thought to be a good first appropriation to assume that V was almost a constant (Gupta,
1999; p. 202).
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