AP Macroeconomics Unit 2 – Economic Indicators and the Business Cycle: Ultimate Study Notes

Measuring Economic Performance

Gross Domestic Product (GDP)

  • Definition: Total market value of all final goods and services produced within a country in a given time period.

  • Types of GDP:

    • Nominal GDP: Measured in current prices (does not account for inflation)

    • Real GDP: Adjusted for inflation → better indicator of economic growth

Components of GDP (Expenditure Approach)

  • C – Consumption (household spending)

  • I – Investment (business spending on capital)

  • G – Government spending

  • NX – Net exports (Exports − Imports)

  • Formula: GDP = C + I + G + (X − M)

AP Tip

  • Only final goods are counted; avoid double-counting intermediate goods.

  • Remember domestic production, not who owns the company.

Memory Trick

  • CIGX → “Consumers Invest, Government eXports”

Real vs. Nominal GDP

  • Real GDP: Adjusts for price changes (inflation or deflation)

  • Nominal GDP: Current prices; may overstate growth during inflation

AP Tip

  • Use Real GDP for comparing economic growth across years.

  • Inflation ≈ Nominal GDP − Real GDP

Memory Trick

  • Real → Real growth; Nominal → Now prices

Unemployment

Types of Unemployment

  • Frictional: Temporary, people between jobs (normal job search)

  • Structural: Skills mismatch or technological changes

  • Cyclical: Caused by downturns in the business cycle

  • Seasonal: Jobs only available during certain seasons

AP Tip

  • Natural rate of unemployment = Frictional + Structural (Cyclical = 0 in “full employment”)

Memory Trick

  • F-S-C-S → Frictional, Structural, Cyclical, Seasonal

Unemployment Rate

  • Formula:

    • Unemployment Rate (%) = (Number of Unemployed ÷ Labor Force) × 100

AP Tip

  • Labor force = Employed + Unemployed actively seeking work

  • Discouraged workers are not counted → may understate unemployment

Inflation

Definition

  • Inflation: General rise in prices across the economy

  • Deflation: General decrease in prices

Measuring Inflation

  • Consumer Price Index (CPI): Measures average price of a market basket of goods/services for consumers

  • Producer Price Index (PPI): Measures prices received by producers

AP Tip

  • CPI used for cost-of-living adjustments; watch for substitution bias in FRQs

Memory Trick

  • CPI = Consumers, PPI = Producers

Inflation Rate Formula

Inflation Rate (%) = [(CPI this year − CPI last year) ÷ CPI last year] × 100

AP Tip

  • Always calculate year-over-year percentage change.

Business Cycle

Phases of the Business Cycle

  • Expansion: Real GDP rises, unemployment falls, inflation may increase

  • Peak: Economy is at maximum output; inflation likely high

  • Contraction (Recession): Real GDP falls, unemployment rises

  • Trough: Lowest point; may trigger expansion

AP Tip

  • FRQs may ask to identify the phase given GDP, unemployment, or inflation trends

Memory Trick

  • E-P-C-T → Expansion, Peak, Contraction, Trough (“Every Peak Can Turn”)

Leading, Lagging, and Coincident Indicators

  • Leading indicators: Predict future economic activity (e.g., stock market, new building permits)

  • Lagging indicators: Confirm trends after they occur (e.g., unemployment rate, CPI)

  • Coincident indicators: Move with the economy (e.g., GDP, industrial production)

AP Tip

  • Match indicator type to timing of economic activity in FRQs

Memory Trick

  • L-L-C → Leading → Look Ahead, Lagging → Lag Behind, Coincident → Current

Key Terms to Remember

  • GDP, Real vs Nominal GDP

  • C + I + G + (X − M)

  • Unemployment types: Frictional, Structural, Cyclical, Seasonal

  • Natural rate of unemployment

  • CPI, PPI, Inflation, Deflation

  • Business cycle phases: Expansion, Peak, Contraction, Trough

  • Leading, Lagging, Coincident indicators

Memory Trick

  • G-U-I-B-L → GDP, Unemployment, Inflation, Business cycle, Leading/lagging/coincident