Crowding Out and the Keynesian MultiplierHL
MacroeconomicsThis diagram illustrates how expansionary fiscal policy can be offset by the crowding out effect, reducing the full impact of the Keynesian multiplier.
Curves and elements
- ad1
- AD1: Initial aggregate demand before fiscal stimulus.
- ad2
- AD2: Increased AD due to government spending and the Keynesian multiplier.
- ad3
- AD3: Final aggregate demand after accounting for crowding out.
- keynesian multiplier
- Keynesian Multiplier: The potential increase in output due to increased government spending.
- crowding out
- Crowding Out: Reduction in private sector activity due to increased government borrowing and higher interest rates.
Key explanations
- 1
Expansionary fiscal policy, such as increased government spending, initially shifts aggregate demand from AD1 to AD2.
- 2
Due to the Keynesian multiplier, the increase in government spending can lead to a proportionally larger increase in aggregate demand.
- 3
However, the crowding out effect occurs when increased government borrowing raises interest rates, reducing private investment and consumption.
- 4
This leads to a partial leftward shift in AD from AD2 to AD3, diminishing the full potential impact of the multiplier.
- 5
The diagram captures this dynamic by showing both the theoretical multiplier effect and the offsetting impact of crowding out.
Example exam question
Using an AD/AS diagram, explain how the crowding out effect may limit the effectiveness of expansionary fiscal policy.
Show example answer
In the AD/AS diagram, government spending initially shifts AD from AD1 to AD2 due to the Keynesian multiplier. However, higher interest rates from increased public borrowing may reduce private investment, causing AD to fall back to AD3. This crowding out effect reduces the overall effectiveness of the fiscal stimulus.
