Question

Assume there are no investment projects in the economy that yield an expected rate of return of 25 percent or more. But suppose there are $10 billion of investment projects yielding expected returns of at least 20 percent; another $10 billion yielding at least 15 percent; another $10 billion yielding at least 10 percent; and so forth.

a. Draw this relationship between the expected rate of return and the amount of investment expenditure. Instructions: Use theb. What will be the equilibrium level of aggregate investment if the real interest rate is as follows: Instructions: Enter yo

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Answer #1

(a)

Expected rate of return (%) Cummulative Investment ($ billion)
25 0
20 10
15 20
10 30
5 40
0 50

30 20 10 20 40 50 60 Invetsment (billion of dollars) Expected rate of return (%)

(b) Equilibrium level of aggregate investment if the real rate of interest is 15 percent.

Answer: $20 billion.

Equilibrium level of aggregate investment if the real rate of interest is 10 percent.

Answer: $30 billion.

Equilibrium level of aggregate investment if the real rate of interest is 5 percent.

Answer: $40 billion.

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