Business Cycle and Economic Indicators Notes

Lesson 12 Notes: The Business Cycle

Business Cycle Overview

  • Definition: The business cycle refers to fluctuations in economic activity over time, characterized by periods of expansion and contraction.

Stages of the Business Cycle

  • Peak:
    • Description: A high point in economic activity.
  • Trough:
    • Description: A low point in economic activity.
  • Recession:
    • Definition: A period of declining economic activity, specifically defined as two consecutive quarters of declining GDP.
  • Expansion:
    • Definition: A period of increasing economic activity, where the economy grows from trough to peak.
    • Note: Expansions are continued until an adverse shock occurs, such as the COVID-19 pandemic.

Potential Output

  • Definition: The level of output that occurs when all resources are utilized efficiently.
  • Context: This reflects sustainable production levels based on current resources and technology.

Long-Run Economic Growth

  • Implication: Long-run economic growth reflects growth in a country's productive capacity.

Output Gap

  • Definition: The difference between actual output and potential output, measured as a percentage of potential output.
  • Formula:
    Output ext{ Gap} = rac{Y - Yp}{Yp}
  • Characteristics:
    • Positive Output Gap: Economic output exceeds potential output, often leading to inflation (described as an "inflationary output gap").
    • Negative Output Gap: Economic output is below potential output, indicating a recessionary condition.

Tracking the Business Cycle

  • Leading Indicators: Variables that tend to predict the future path of the economy. Examples include:
    • Future business confidence indicators.
    • Consumer confidence metrics.
    • Stock market trends.
  • Lagging Indicators: Variables that tend to follow business cycle movements with a delay. Examples include:
    • Unemployment rates.
    • Corporate profits post economic shifts.

Ten Indicators to Track the Business Cycle

  1. Real GDP: The broadest measure of economic activity, indicating the total size of the economy.
    • Caution: Initial reports may be incomplete.
  2. Real GDI (Gross Domestic Income): A check on GDP, adding total income earned.
    • Note: GDP and GDI should ideally be equal but often differ, especially in early reports.
  3. Nonfarm Payrolls: Indicator of the labor market health, tracking job creation.
  4. Unemployment Rate: Indicates excess capacity in the market, the share of the labor force seeking jobs.
  5. Initial Unemployment Claims: Reflects job losses, providing timely data on employment trends.
  6. Business Confidence: Measured through management surveys like the Purchasing Managers’ Index.
  7. Consumer Confidence: Assesses public sentiment about the economy, such as the University of Michigan’s Consumer Sentiment Index.
  8. Inflation Rate: Determined by the Consumer Price Index, reflecting overall price trends.
  9. Employment Cost Index: Measures wage and benefit trends, indicating inflationary pressure.
  10. Stock Market Performance: Reflects expectations of future business profitability, though should be interpreted cautiously as historical data shows it has inaccurately predicted recessions.

Aggregate Demand (AD)

  • Definition: Aggregate Demand is a curve showing the total quantity of goods and services demanded across all levels of the economy at various price levels.
Causes of Movements Along the AD Curve
  • Price Level Increases: Decrease in the aggregate expenditure (AE) due to:
    • Consumption (C)
    • Investment (I)
    • Government Spending (G)
    • Net Exports (NX)
  • Effects:
    1. Wealth Effect: Higher price levels reduce the purchasing power of wealth, leading to lower consumption.
    2. Interest Rate Effect: Increased price levels lead to higher interest rates, reducing spending.
    3. International Trade Effect: Higher prices may reduce exports and increase imports due to exchange rate fluctuations.

Causes of Shifts of the Aggregate Demand Curve

  1. Consumption Changes: Factors leading to an increase or decrease in households' spending.
  2. Investment Changes: Conditions prompting businesses to spend more or less on capital.
  3. Government Spending Changes: Variations in government expenditure on goods and services.
  4. Net Exports Changes: Fluctuations in demand from foreign buyers for domestic goods.
    • Factors influencing this include trade policies, exchange rates, and global economic conditions.

Aggregate Supply

Short-Run Aggregate Supply (SRAS)
  • Definition: Relationship between the aggregate price level and the total output producers are willing to supply, with prices being sticky.
    • Prices and output adjust together based on input costs and market conditions.
  • Shifts in SRAS: Influenced by changes in:
    • Input prices, wage rates.
    • Availability of raw materials.
    • Global economic conditions (e.g., exchange rates).
Long-Run Aggregate Supply (LRAS)
  • Definition: In the long-run, real GDP is determined by:
    • Available technology.
    • Supply of labor and capital.
    • Long-standing institutional structures.
  • Price Level Influence: In the long run, all prices tend to rise together, leading to stable long-run growth without continual inflation.
Adjustments from Short-Run to Long-Run Aggregate Supply (AS/AD Model)
  • Sticky Prices: Prices adjust grudgingly to market changes and can create temporary imbalances (e.g., unemployment).

Steps for Forecasting Macroeconomic Outcomes

  1. Determine if shifts impact Aggregate Supply, Aggregate Demand, or both.
  2. Identify whether shifts represent increases or decreases.
  3. Assess how equilibrium conditions (price level and real GDP) will change as a result.
  4. Evaluate potential changes in output capacity over time.