c. Find the equilibrium interest rate r and the associated level of investment spending. Note that the equilibrium interest rate you find will already be given in percentage terms. For example, if you find thatr 8, this mean that the interest rate is 8%. %3! d. Suppose that government spending increases to 1,250 (so that AG-250). Assume taxes and transfer payments are unchanged. Compute the new level of privaté saving, public saving, and national saving. c. Find the new equilibrium interest rate and the new level of investment spending. Hint: Y is still 5000, since GDP is fixed at potential GDP in the long-run.

ENGR.ECONOMIC ANALYSIS
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Chapter1: Making Economics Decisions
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2. Suppose a closed economy in the long run is characterized by the following equations:
Y =C+I+G
Y = Y = 5,000
C= 250+0.75 x (Y -T+Tr)
I 1,000-50r
%3D
G=1,000
T =1,300
Tr 300
Y is total output, Y is potential GDP (full employment output), C is consumption, / is
investment, r is the real interest rate (as a whole number, so r 5 is a 5% real interest
rate), G is government spending, Tis taxes, and Tr is transfer payments.
a. Look at the consumption function (the third equation). What is the marginal propensity
to consume? What does it mean? What is autonomous consumption? What does it mean?
b. Compute the level of consumption spending, private saving, public saving, and
national saving.
c. Find the equilibrium interest rate r and the associated level of investment spending.
Note that the equilibrium interest rate you find will already be given in percentage terms.
For example, if you find that r 8, this mean that the interest rate is 8%.
d. Suppose that government spending increases to 1,250 (so that AG=250). Assume taxes
and transfer payments are unchanged. Compute the new level of private saving, public
saving, and national saving.
e. Find the new equilibrium interest rate and the new level of investment spending. Hint:
Y is still 5000, since GDP is fixed at potential GDP in the long-run.
Transcribed Image Text:2. Suppose a closed economy in the long run is characterized by the following equations: Y =C+I+G Y = Y = 5,000 C= 250+0.75 x (Y -T+Tr) I 1,000-50r %3D G=1,000 T =1,300 Tr 300 Y is total output, Y is potential GDP (full employment output), C is consumption, / is investment, r is the real interest rate (as a whole number, so r 5 is a 5% real interest rate), G is government spending, Tis taxes, and Tr is transfer payments. a. Look at the consumption function (the third equation). What is the marginal propensity to consume? What does it mean? What is autonomous consumption? What does it mean? b. Compute the level of consumption spending, private saving, public saving, and national saving. c. Find the equilibrium interest rate r and the associated level of investment spending. Note that the equilibrium interest rate you find will already be given in percentage terms. For example, if you find that r 8, this mean that the interest rate is 8%. d. Suppose that government spending increases to 1,250 (so that AG=250). Assume taxes and transfer payments are unchanged. Compute the new level of private saving, public saving, and national saving. e. Find the new equilibrium interest rate and the new level of investment spending. Hint: Y is still 5000, since GDP is fixed at potential GDP in the long-run.
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