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3 April, 08:09

Use the expenditure multiplier to calculate the change in AD that would result from a $100 million increase in government spending if the MPC = 0.8. How would the same change in spending affect AD if the MPC = 0.95?

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  1. 3 April, 08:10
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    If MPC is 0.8, Change in GDP = $500 million

    If MPC is 0.95, Change in GDP = $2,000 million

    Explanation:

    Expenditure Multiplier is the amount by which the real GDP will change if autonomous expenditure changes by a given amount.

    It is calculated as follows: 1 / (1-MPC).

    MPC is the portion of additional income that is spent. If the MPC is 0.8, then the expenditure multiplier will be = 1 / (1-0.8) = 5

    Using the first scenario with an increase in government spending by $100million, the resulting change in GDP would be

    Change in GDP = change in autonomous expenditure * Multiplier

    = 100 * 5 = $500 million

    Scenario 2, MPC of 0.95

    Expenditure Multiplier = 1 / (1-0.95) = 20

    Change in GDP = 100 * 20 = $2000 million
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