An '''equation of exchange''' relates the quantity of money (M), its velocity of circulation (V), the quantity of goods and services (Q) and their average price (P):
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An equation of exchange relates the quantity of omney (M), its velocity of circulation (V), the quantity of goods and services (Q) and their average price (P):
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: M*V = P*Q
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: MV = PQ
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In other words, the total amount of money spent on goods and services (M*V) equals the total amount of money received for them (P*Q).
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In other words, the total amount of money spent on goods and services (MV) equals the total amount of money received for them (PQ).
This equation relies on the classical [[quantity theory of money]].
This equation relies on the classical [[quantity theory of money]].