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AE Model: Graphing Macroeconomic Equilibrium quiz

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  • What does the aggregate expenditures (AE) model describe the relationship between?
    It describes the relationship between total spending (aggregate expenditures) and production (GDP) in the economy.
  • What are the four components of aggregate expenditures?
    The four components are consumption, investment spending, government purchases, and net exports.
  • How is consumption modeled in the AE model?
    Consumption is modeled as a base amount plus an additional amount that increases with disposable income, determined by the marginal propensity to consume.
  • What effect do investment, government purchases, and net exports have on the AE line?
    They are considered constant and only shift the AE line upward without changing its slope.
  • What does the 45-degree line on the AE graph represent?
    It represents all points where aggregate expenditures equal GDP, indicating macroeconomic equilibrium.
  • How do you find macroeconomic equilibrium on the AE graph?
    It is found where the aggregate expenditures line intersects the 45-degree line.
  • What variable is typically used to represent GDP on the AE graph?
    GDP is typically represented by the variable Y on the graph.
  • What happens to the consumption function when investment is added to it?
    Adding investment shifts the consumption function upward by the amount of investment, but the slope remains the same.
  • How does adding government purchases affect the AE line?
    It shifts the AE line upward by the amount of government purchases, without changing the slope.
  • What is the equation for aggregate expenditures after adding all components?
    The equation is AE = C + I + G + NX, where each letter represents one component.
  • If the marginal propensity to consume is 0.5, what does this mean?
    It means that for every extra dollar of income, half is spent on consumption and half is saved.
  • Why is there still consumption when GDP is zero?
    Because there is a base level of consumption needed for essentials like food and shelter, even with no income.
  • What is the main purpose of drawing the 45-degree line first on the AE graph?
    It helps identify where macroeconomic equilibrium will occur when the AE line is drawn.
  • What does it mean if the AE line is above the 45-degree line?
    It means aggregate expenditures are greater than GDP, indicating that spending exceeds production.
  • What does it mean if the AE line is below the 45-degree line?
    It means aggregate expenditures are less than GDP, indicating that production exceeds spending.