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What will happen to real GDP given a $30 billion increase in the money supply under...

What will happen to real GDP given a $30 billion increase in the money supply under the following assumptions?

  • Each $5 billion increase in the money supply reduces the rate of interest by 0.50 percentage point.

  • Each 1 percentage point decline in interest rates stimulates $100 billion worth of new investment.

  • The spending multiplier is 2.5.

Assume that the aggregate supply curve is so flat that the price level does not rise noticeably when aggregate demand increases.

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Answer #1

Money supply is increased by 30 billion. This will decrease the rate of interest by (30/5)*0.5 = 3%.

The decrease in the rate of interest by 3% will increase the investment by (3/1)*100 = 300 billion.

Spending multiplier is 2.5 and investment is increased by 300 billion. This indicates that the real GDP will increase by 300 x 2.5 = 750 billion.

Therefore real GDP will increase by 750 billion when money supply is increased by 30 billion.

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