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C = 40 + 0.8Y I, = 60 - 2i i=i = 10 (Advanced analysis) The equations are for a private closed economy, where Cis consumption

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Answer #1

C = 40 + 0.8Y

Ig = 60 - 2i

i = 10

Ig = 60 - (2 * 10) = 60 - 20 = 40

In a private closed economy, at equilibrium,

Y = C + Ig

Y = 40 + 0.8Y + 40

Y = 80 + 0.8Y

Y - 0.8Y = 80

0.2Y = 80

Y = 80/0.2

Y = 400

Thus,

The equilibrium level of GDP in this economy is $400.

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