Suppose that the marginal propensity to consume is 0.75 and that there is a decrease in autonomous aggregate spending of $20 million. Everything else held constant, the multiplier is equal to and real GDP will .

Multiplier = 4 ; real GDP decrease by $80,000,000

Explanation:

GIVEN THE FOLLOWING ;

Marginal Propensity to Consume (MPC) = 0.75

Change in aggregate spending = $20,000,000

The marginal propensity to consume is the ratio of change in what is spent to the total income.

Multiplier = 1 ÷ (1 - MPC)

Multiplier = 1 ÷ (1 - 0.75)

Multiplier = 1÷0.25 = 4

Real Gross Domestic Product (GDP) = Multiplier × change in spending

Real GDP = 4 × $20,000,000 = $80,000,000 decrease

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