Let AE = Aggregate Expenditures, C = Consumption, I_P =

question 62

Multiple Choice

Let AE = Aggregate Expenditures, C = Consumption, I_P = Planned Investment,
G = Government Purchases. Consider a simple aggregate expenditures model, where
AE = C + I_P + G and all components of aggregate expenditures except consumption are autonomous. All other things unchanged, a decrease in the price level

• A) shifts the aggregate expenditures curve upwards.
• B) shifts the aggregate expenditures curve downwards.
• C) causes a movement up along a given aggregate expenditures curve.
• D) causes a movement down along a given aggregate expenditures curve.

Identify and interpret the short-run supply curve for a purely competitive firm.

Apply the principle of marginal analysis to firm decision-making in purely competitive markets.

Determine the conditions under which a firm should continue production or shut down in the short run.

Understand the relationship between price, average revenue, marginal cost, and marginal revenue in the determination of production levels.

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