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AE Model: Algebraic Approach quiz

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  • What is the condition for macroeconomic equilibrium in the AE model?
    Macroeconomic equilibrium occurs when aggregate expenditures equal real GDP, or Y = C + I + G + NX.
  • How is aggregate expenditures (AE) expressed algebraically?
    Aggregate expenditures are expressed as AE = C + I + G + NX.
  • What does 'Y' represent in the AE model equation?
    'Y' represents real GDP in the AE model equation.
  • How is consumption (C) modeled in the AE model?
    Consumption is modeled as C = a + MPC × Y, where 'a' is autonomous consumption and MPC is the marginal propensity to consume.
  • What does MPC stand for and what does it measure?
    MPC stands for marginal propensity to consume and measures the fraction of additional income that is spent on consumption.
  • Why does consumption depend on GDP in the AE model?
    Consumption depends on GDP because higher GDP leads to higher disposable income, which increases consumption.
  • What are the components of aggregate expenditures?
    The components of aggregate expenditures are consumption (C), investment (I), government spending (G), and net exports (NX).
  • How does an increase in GDP affect disposable income and consumption?
    An increase in GDP raises disposable income, which in turn leads to higher consumption.
  • What is the relationship between aggregate expenditures and real GDP at equilibrium?
    At equilibrium, aggregate expenditures are equal to real GDP.
  • What is the algebraic trick when solving for consumption in the AE model?
    The trick is that consumption depends on GDP, so you must use the GDP value to calculate consumption.
  • What does 'a' represent in the consumption function C = a + MPC × Y?
    'a' represents autonomous consumption, which is the base level of consumption independent of income.
  • Why are I, G, and NX usually treated as constants in the AE model?
    I, G, and NX are usually treated as constants to simplify the calculation of equilibrium.
  • What happens to consumption if GDP increases, according to the AE model?
    If GDP increases, consumption also increases because disposable income rises.
  • How do you find the equilibrium GDP using the algebraic approach?
    You set aggregate expenditures equal to GDP and solve for Y using the consumption function and constants for I, G, and NX.
  • What is the main purpose of using the algebraic approach in the AE model?
    The main purpose is to calculate the equilibrium GDP where aggregate expenditures equal real GDP using linear equations.