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Consider the following data for a closed economy:

- [tex]Y = \$12[/tex] trillion
- [tex]C = \$8[/tex] trillion
- [tex]G = \$2[/tex] trillion
- [tex]S_{\text{public}} = -\$0.50[/tex] trillion
- [tex]T = \$2[/tex] trillion

Now suppose that government purchases increase from [tex]\$2[/tex] trillion to [tex]\$2.50[/tex] trillion, but the values of [tex]Y[/tex] and [tex]C[/tex] are unchanged. What must happen to the values of [tex]S[/tex] and [tex]I[/tex]?

A. [tex]S[/tex] and [tex]I[/tex] increase by [tex]\$0.50[/tex] trillion.
B. [tex]S[/tex] and [tex]I[/tex] drop by [tex]\$0.50[/tex] trillion.
C. [tex]S[/tex] drops by [tex]\$0.50[/tex] trillion and [tex]I[/tex] increases by [tex]\$0.50[/tex] trillion.
D. [tex]S[/tex] increases by [tex]\$0.50[/tex] trillion and [tex]I[/tex] drops by [tex]\$0.50[/tex] trillion.

Answer :

Answer:

B. S and I drop by ​$0.50 trillion.

Explanation:

In a closed economy we got the following identity

Y = C + I + G

The income is equal to the amount consumed, the amount invested and the goverment spending

12 = 8 + I + 2

I = 2

The investment is equal to the savings of the economy in this case as government and taxes are equal, the public runs at equilibrium

While private sector:

Y - C - T = private savings

12 - 8 - 2 = 2 Private saving

If Government increase government spending by 0.50

The government will run into a deficit making savings decrease as will borrow from the private sector.

This makes the investment decrease as well as savings for the economy as a whole.

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Rewritten by : Jeany