The sum total of the contribution of both these schools of thought is the consensus taught in undergraduate macroeconomics courses across the world: that the central bank should be in the business of expanding the money supply at a controlled pace, to encourage people to spend more and thus keep the unemployment level sufficiently low. Should a

Inflation is caused by a sustained increase in the supply of money. When people have more money, they spend it, and without an increase in the supply of goods, prices must rise. As Nobel laureate Milton Friedman once wrote: “Inflation is always and everywhere a monetary phenomenon.”

Big Idea Nine: Inflation Is Caused by Increases in the Supply of Money