the quantity theory of money serves at least three purposes in classical model. Explain each of its role in detail?
1 .In classical model quantity theory of money determines aggregate demand which determines the price level.
According to quantity theory
MV=PY
M=money quantiy
V=transaction velocity of money i.e. number of time a dollar exchange hands
P=price level
Y=output
2. it helps in determininng money demand
Md=kPY
where k is proportion of nominal income
3 . If velocity of transaction is already known and not simply defined residually to equate MV and PY , the equation of exchange is not merely a definition. With output fixed from the supply side, the equation of exchange now expresses a relationship of proportionality between the exogenously given money supply and the price level: MV = PY
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