AP Macroeconomics / Long-Run Consequences of Stabilization Policies
Lesson
Money growth, debt, and the supply side of growth
Too much money chasing output raises prices. Lasting growth needs capacity.
Learning goals
- Use the quantity equation idea to link money and the price level.
- Name real factors that can shift LRAS.
Explanation
A simple quantity story says money times velocity equals the price level times real output. If velocity is stable and output is at potential, faster money growth shows up as inflation. That is a long-run warning, not a claim that every month’s price change is only about money.
Deficits add to public debt. The burden depends on whether borrowed funds built productive capacity and on the real interest rate. Long-run growth itself comes from more capital, more human skill, better technology, and institutions that make investment worthwhile. Those shift LRAS. Demand policy cannot print a permanently higher potential.
Key terms
- Velocity of money. How often a unit of money is spent on final goods in a period.
- Physical capital. Produced goods used to make other goods, such as machines and buildings.
Common mistakes
- Shifting only AD when a question is about productivity growth.
- Calling all public debt automatically ruinous or automatically harmless.
Practice
Original Marlow Works items. Check the answer explanation after you try.
Suppose the economy is at long-run equilibrium and the central bank unexpectedly increases the money supply. In a short essay, describe the short-run effects on interest rates, investment, and output, then explain the long-run adjustment of the price level and real output.
Original Marlow Works item — not a College Board question.
Take your time—this is practice, not a test.
Answer explanation
Real output is fixed at potential and velocity is stable. Money supply rises 8%. What happens to the price level in the quantity story?
Answer. The price level rises about 8%.
With Y and V fixed, P moves in proportion to M.
Related resources
External links with reuse status. Marlow Works is independent and does not copy restricted exam or textbook material.
Official / link only
AP Macroeconomics course page
Official six-unit framework for national income and policy models.
College Board · All rights reserved · accessed 2026-10-01
Open sourceOfficial / link only
FRED economic data
Federal Reserve economic data. Terms vary by series; do not scrape or ingest.
Federal Reserve Bank of St. Louis · Varies by series · accessed 2026-10-01
Open source