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Example 1: If Real GDP is $18,000 billion and Natural Real GDP is $18,500 billion, the economy<br />

is in a recessionary gap. Keynesian theory calls for expansionary fiscal policy to close this<br />

recessionary gap. If the MPC is .80, the multiplier will be 5 (1 ÷ [1 – MPC]). With a multiplier of 5,<br />

an increase in government purchases of $100 billion would cause an eventual increase in Real<br />

GDP of $500 billion (Change in Real GDP = Initial Change x Multiplier). If Real GDP increases by<br />

$500 billion, the recessionary gap is closed and Real GDP equals Natural Real GDP. The graphs<br />

below illustrate the recessionary gap and the return to Natural Real GDP triggered by the<br />

increase in government purchases.<br />

Price<br />

Level<br />

Price<br />

Level<br />

Recessionary Gap<br />

Q N<br />

$18000B $18500B<br />

Real GDP<br />

SRAS<br />

Return to Natural Real GDP<br />

Q N<br />

$18000B $18500B<br />

Real GDP<br />

SRAS<br />

FOR REVIEW ONLY - NOT FOR DISTRIBUTION<br />

AD<br />

AD<br />

1<br />

AD2<br />

Fiscal Policy 9 - 2

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