Kwantiteitstheorie van Geld II

The Quantity Theory of Money explains how changes in the money supply affect spending, prices, and economic stability.

Because of its clear link between money and economic activity, economists and policymakers use the theory to guide decisions on inflation control and monetary policy. For example, if the money supply grows faster than transactions, the equation suggests prices will rise. This helps economists anticipate inflation.

This relationship is captured in a simple equation: multiplying the money supply (M) by the velocity of money (V)—how many times each dollar is spent—gives nominal GDP. Multiplying the price level (P) by total number of transactions (T) shows the value of all exchanges—not just those counted in GDP.

So, MV = PT. The left-hand side (M × V) represents total money spent, while the right-hand side (P × T) shows the value of all transactions—even though not all are new production. MV = PT is called an identity because, if T includes every transaction, the equation always balances.

This version highlights why managing the money supply is important for stable prices and economic growth.