Learning Module 2
Understanding Business Cycles
Key Outcomes Summary & Practice Problems
What you must be able to do
Curriculum Year: 2026
Describe the business cycle and its phases.
Describe credit cycles.
Describe how resource use, consumer and business activity, housing sector activity, and external trade sector activity vary over the business cycle and describe their measurement using economic indicators.
1 · The Business Cycle
Definition — Business cycles are recurrent expansions and contractions in economic activity affecting broad segments of the economy. They are recurrent but not periodic; duration varies from more than one year to 10-12 years.
Classical Cycle — Fluctuations in the level of economic activity (e.g., GDP in volume terms). Contraction phases are often short; expansions are much longer.
Growth Cycle — Fluctuations in economic activity around the long-term potential or trend growth level. Focuses on how much actual activity is below or above trend.
Growth Rate Cycle — Fluctuations in the growth rate of economic activity (e.g., GDP growth rate). Peaks and troughs are recognized earlier than in other definitions.
2 · Four Phases of the Business Cycle
Economy at trough; output below potential. Activity starts increasing, closing the negative output gap. Layoffs slow; inflation remains moderate.
Output increases above potential; positive output gap opens. Hiring accelerates; unemployment falls. Inflation picks up modestly.
Output at peak (largest positive output gap). Growth slows; hiring continues but at a slower pace. Inflation accelerates further.
Output falls below potential; negative output gap opens. Layoffs increase; unemployment rises. Inflation decelerates with a lag.
Variable | Recovery | Expansion | Slowdown | Contraction |
|---|---|---|---|---|
Output gap | Negative, narrowing | Positive, widening | Positive, narrowing | Negative, widening |
Employment | Layoffs slow | Hiring accelerates | Hiring slows | Layoffs increase |
Inflation | Moderate | Picks up | Accelerates | Decelerates |
3 · Credit Cycles
Definition — Credit cycles describe the changing availability and pricing of credit. They are connected to real economic activity captured by business cycles.
Characteristics — Credit cycles tend to be longer, deeper, and sharper than business cycles. Strong peaks in credit cycles are closely associated with subsequent systemic banking crises.
Importance — Loose private sector credit contributes to asset price and real estate bubbles that burst when capital markets draw down. Financial variables co-vary closely and help explain the size of economic expansions or contractions.
4 · Economic Indicators
Turning points precede the overall economy. Used to predict future state.
Examples: Stock prices, building permits, average weekly hours, money supply.
Turning points are close to the overall economy. Used to identify present state.
Examples: GDP, industrial production, personal income, retail sales.
Turning points occur later than the economy. Used to confirm past conditions.
Examples: Unemployment rate, unit labor costs, prime rate.
Composite Indicators — Combine multiple variables (e.g., Conference Board LEI, OECD CLI).
Diffusion Index — Reflects the proportion of components moving in a pattern consistent with the overall index. Provides a measure of the breadth of change.
Nowcasting — Real-time monitoring of economic and financial variables to estimate the current state (e.g., Atlanta Fed GDPNow).
Surveys — Business tendency and consumer surveys (e.g., IFO, PMI, Tankan) provide timely qualitative data.
5 · Resource Use, Capital Spending & Inventories
Employment — Lags the cycle. Firms reduce overtime before layoffs in contractions; increase overtime before hiring in recoveries.
Capital Spending — Highly procyclical and volatile. Driven by business conditions, expectations, and capacity utilization. Orders for light equipment with high obsolescence (e.g., software) are reinstated first; heavy equipment and construction follow.
Inventories — Small relative to GDP but fluctuate dramatically. Inventory-sales ratio rises as a contraction unfolds. Early in recovery, inventories fall as sales outstrip production.
Capacity Utilization — Low in contractions; high in expansions, signaling potential for new capital spending.