AP® Macroeconomics Cheat Sheets: Formulas, Graphs, Flashcards & Quiz

Unemployment, Inflation, Real Values, and Business Cycles

Labor market measurement is a common calculation and interpretation topic. A person is employed if they have a job. A person is unemployed if they do not have a job, are available for work, and are actively seeking work. The labor force equals employed plus unemployed. People outside the labor force include retirees, many full-time students, homemakers not seeking work, and discouraged workers. Discouraged workers are not counted as unemployed, which can make the unemployment rate understate labor market weakness.

There are three main types of unemployment. Frictional unemployment occurs when workers are between jobs or searching. Structural unemployment occurs when worker skills or locations do not match available jobs. Cyclical unemployment occurs because of recession and weak aggregate demand. The natural rate of unemployment includes frictional and structural unemployment, so full employment does not mean zero unemployment. When the economy is at full employment, cyclical unemployment is zero.

Inflation is the percentage increase in the price level. The CPI compares the cost of a fixed basket of consumer goods to the cost of that basket in a base year. The inflation rate measures the percentage change in CPI from one year to another. CPI can overstate inflation because of substitution bias, new products, and quality improvements. The GDP deflator is broader because it covers goods and services produced in the economy, not only a fixed consumer basket.

Nominal values are measured in current dollars. Real values adjust for inflation. Real GDP removes the effect of price changes, so it is better for measuring changes in actual output. Nominal interest rates are stated rates, while real interest rates adjust for inflation. The Fisher relationship says that the nominal interest rate equals the real interest rate plus expected inflation. Unexpected inflation redistributes wealth: it helps borrowers because they repay with dollars worth less than expected, and it hurts lenders because the repayment has less purchasing power.

Business cycles describe expansions and recessions around long-run potential output. In a recessionary gap, actual GDP is below potential GDP and unemployment is above the natural rate. In an inflationary gap, actual GDP is above potential GDP and unemployment is below the natural rate, but upward pressure on wages and prices eventually appears. Correctly identifying the gap is the first step in choosing fiscal or monetary policy.

Aggregate Demand, Aggregate Supply, Multipliers, and Fiscal Policy

Aggregate demand is total spending at each price level. It slopes downward because a lower price level increases real wealth, lowers interest rates through money demand, and can depreciate the currency through capital outflows, raising net exports. AD shifts when consumption, investment, government purchases, or net exports change for reasons other than the price level. Consumer confidence, tax changes, government spending, foreign income, exchange rates, and business expectations can all shift AD.

The multiplier effect explains why an initial change in spending causes a larger final change in GDP. If households spend part of each additional dollar of income, one person's spending becomes another person's income, creating additional rounds of spending. MPC is the marginal propensity to consume. MPS is the marginal propensity to save. Since each extra dollar is either consumed or saved, \(MPC+MPS=1\). A higher MPC creates a larger spending multiplier because less income leaks out into saving each round.

Tax multipliers are smaller in absolute value than spending multipliers because a tax change first affects disposable income, and some of that disposable income is saved. If the government increases purchases by \(100\), the entire \(100\) enters spending directly. If taxes fall by \(100\), consumption rises only by \(MPC\times100\). This is why the spending multiplier is \(1/MPS\), while the tax multiplier is \(-MPC/MPS\).

Aggregate supply adds the production side. SRAS slopes upward because wages and some input costs are sticky in the short run. LRAS is vertical at full-employment output because real output is determined by resources, technology, and productivity in the long run. Demand shocks shift AD. Supply shocks shift SRAS. Productivity and resource changes can shift LRAS.

Fiscal policy uses government spending and taxes to influence aggregate demand. Expansionary fiscal policy shifts AD right and is used to fight recessionary gaps. Contractionary fiscal policy shifts AD left and is used to fight inflationary gaps. Automatic stabilizers, such as progressive taxes and transfer payments, reduce the size of business-cycle swings without new legislation. Recession lowers tax revenue and raises transfers automatically, cushioning the decline in disposable income.

Self-adjustment is the long-run process that returns output to potential through wage and price flexibility. In a recessionary gap, unemployment puts downward pressure on wages, lowering production costs and shifting SRAS right. In an inflationary gap, labor markets are tight, wages rise, costs increase, and SRAS shifts left. Fiscal policy can speed up adjustment, but it may create deficits, crowding out, or inflation depending on the situation.

Money, Banking, Money Market, Monetary Policy, and Loanable Funds

Money is any asset generally accepted as payment. It serves as a medium of exchange, unit of account, and store of value. M1 is the narrowest commonly tested measure and includes currency, coins, checking deposits, and traveler’s checks. M2 includes M1 plus savings deposits, small time deposits, and money market accounts. The monetary base includes currency in circulation and bank reserves.

Fractional reserve banking allows banks to create money by lending. When a bank receives a deposit, it must keep required reserves and can lend excess reserves. The borrower spends the loan, the money is deposited in another bank, and the process repeats. The maximum money creation by the banking system equals excess reserves times the money multiplier. However, a single bank can only lend its excess reserves. This distinction is frequently tested.

Financial assets require trade-offs. Cash is liquid but usually earns little or no return. Bonds and stocks may offer returns but involve risk and are less liquid. Bond prices and interest rates are inversely related. If market interest rates rise, existing bonds with lower fixed payments become less attractive, so their prices fall. If market rates fall, existing bonds become more attractive, so their prices rise.

The money market graph shows nominal interest rate on the vertical axis and quantity of money on the horizontal axis. Money supply is vertical because the central bank controls it. Money demand slopes downward because the opportunity cost of holding money falls when interest rates fall. Expansionary monetary policy increases money supply and lowers nominal interest rates, increasing investment and AD. Contractionary monetary policy decreases money supply and raises nominal interest rates, reducing investment and AD.

The loanable funds market is different. It shows the real interest rate on the vertical axis and quantity of loanable funds on the horizontal axis. Supply of loanable funds comes from saving. Demand for loanable funds comes from borrowing for investment. A government deficit reduces public saving and shifts demand for loanable funds right or supply left depending on presentation, raising the real interest rate. This can crowd out private investment.

Long-Run Consequences, Economic Growth, Phillips Curve, Open Economy, and Forex

Long-run macroeconomics focuses on what affects potential output and what changes only nominal variables. In the short run, policy can move real output and unemployment. In the long run, real output returns to potential output, and growth depends on resources, human capital, physical capital, technology, and productivity. Monetary policy is powerful in the short run, but in the long run money is neutral: increasing the money supply mainly increases the price level, not real GDP.

The quantity theory of money is summarized by \(MV=PY\). If velocity and real output are stable, growth in money supply leads to growth in the price level. This is why long-run inflation is often treated as a monetary phenomenon. On AP questions, do not shift LRAS because of a money supply change. LRAS shifts because of real factors: labor, capital, resources, technology, or productivity.

The Phillips Curve connects inflation and unemployment. The short-run Phillips curve slopes downward because there is a short-run trade-off between inflation and unemployment. The long-run Phillips curve is vertical at the natural rate of unemployment. Demand shocks move the economy along the SRPC. Supply shocks shift the SRPC. If the natural rate changes because of labor market improvements or structural changes, the LRPC shifts.

Government budget deficits create important long-run effects. A deficit means government spending and transfers exceed tax revenue. The government borrows, increasing demand for loanable funds and raising the real interest rate. Higher real interest rates reduce private investment. Lower private investment reduces capital accumulation and slows long-run growth. This is the crowding-out effect.

Open economy concepts connect domestic policy to global markets. The current account includes net exports, net income from abroad, and net transfers. The capital and financial account includes financial asset flows. In a simplified AP framework, the current account and capital/financial account balance each other. A current account deficit is matched by a capital and financial account surplus.

Forex analysis requires careful direction. If U.S. real interest rates rise, foreign investors want U.S. assets, demand for dollars increases, and the dollar appreciates. Appreciation makes U.S. exports more expensive to foreigners and imports cheaper for U.S. consumers, reducing net exports. This means expansionary fiscal policy may be partially offset twice: by crowding out private investment and by reducing net exports through currency appreciation.

AP® Macroeconomics FRQ Strategy

The AP Macroeconomics free-response section includes one long FRQ and two short FRQs. The section lasts 60 minutes and includes a 10-minute reading period. FRQs ask students to make assertions, explain economic outcomes, perform calculations, and create graphs. The key to high scores is not writing long paragraphs; it is making correct, clearly labeled chains of economic reasoning.

Start by identifying the model. If the prompt mentions price level and real output, think AD-AS. If it mentions nominal interest rate and money supply, think money market. If it mentions real interest rate, saving, investment, or government borrowing, think loanable funds. If it mentions currency value, exports, imports, or capital flows, think forex. If it mentions inflation and unemployment, think Phillips Curve.

Graphing FRQs require labels. Label axes, curves, equilibrium, and any shifts. Use arrows when a curve shifts. Show the original and new equilibrium. Do not draw a graph from memory without connecting it to the prompt. For the money market, the vertical axis is nominal interest rate. For loanable funds, the vertical axis is real interest rate. For AD-AS, the vertical axis is price level and the horizontal axis is real GDP. For forex, the vertical axis is exchange rate and the horizontal axis is quantity of currency.

Calculations should show work. Write the formula, substitute values, and include the final answer. For multiplier problems, compute \(MPS\) first if needed. For unemployment calculations, make sure the denominator is labor force, not working-age population. For inflation, use the initial CPI as the denominator. For reserve problems, calculate required reserves before excess reserves. For money creation, separate what one bank can lend from what the banking system can create.

Explanation questions should use directional chains. A strong macro answer does not say “monetary policy changes output.” It says “the central bank buys bonds, increasing reserves and money supply, lowering the nominal interest rate, increasing investment, shifting AD right, increasing real GDP and the price level in the short run.” That chain shows causal understanding and earns more reliably than vague statements.

For policy questions, match the policy to the gap. A recessionary gap calls for expansionary fiscal or monetary policy. Expansionary fiscal policy means higher government spending or lower taxes. Expansionary monetary policy means actions that increase money supply or lower interest rates. An inflationary gap calls for contractionary policy: lower government spending, higher taxes, lower money supply, or higher rates.

When the prompt asks for long-run adjustment, do not keep output permanently away from \(Y_f\). In the long run, wages and prices adjust. Recessionary gaps push wages down, shifting SRAS right. Inflationary gaps push wages up, shifting SRAS left. Monetary policy changes nominal variables in the long run, not real output.

FRQ sentence pattern: “Because [initial event], [market/model] shifts [direction], causing [price/rate/output] to [rise/fall], which leads to [next macro effect].”

How to Study AP® Macroeconomics With This Cheat Sheet

AP Macroeconomics is best studied through models, formulas, and cause-effect chains. Reading definitions is not enough. You need to practice drawing graphs, labeling axes, shifting curves, calculating values, and explaining the chain from one market to another. This cheat sheet gives you the content, but your score improves when you actively use it.

1. Start with one cheat-sheet card. Read one card and write down every formula, graph, or policy chain you cannot reproduce from memory.
2. Redraw the model. For each topic, draw the relevant graph from scratch. Label axes, curves, equilibrium, and shifts.
3. Turn every policy into a chain. Example: expansionary monetary policy → money supply rises → interest rate falls → investment rises → AD rises.
4. Practice formulas with units. Show all steps for CPI, inflation, unemployment, reserve requirements, multipliers, and money creation.
5. Use the flashcards. Say the answer before revealing it. If you miss a card, write a one-sentence example.
6. Take the quiz without notes. Use missed questions to decide which guide tab to reread.
7. Score your practice. After a timed practice set, use the AP Macro score calculator to estimate performance.

A simple seven-day plan works well. Day 1: scarcity, PPC, comparative advantage, supply and demand. Day 2: GDP, unemployment, CPI, inflation, and real versus nominal values. Day 3: AD, multipliers, AS, gaps, and fiscal policy. Day 4: money, banking, money market, and monetary policy. Day 5: loanable funds, crowding out, Phillips Curve, and long-run growth. Day 6: balance of payments, forex, exchange rates, capital flows, and net exports. Day 7: mixed FRQs, graphs, and formula review.

The best AP Macro review habit is to ask “what market changes first, what curve shifts, what happens to the price or interest rate, and what happens next?”