Chapter9: Demand-side Equilibrium: Unemployment Or Inflation?
Section9.A: The Simple Algebra Of Income Determination And The Multiplier
Problem 5TY
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Q4. In the Keynesian cross model, assume that the consumption function is given by
C=120+0.8(Y-T).
Planned investment is 200; government purchases and taxes are both 400.
a. Graph planned expenditure as a function of income.
b. What is the equilibrium level of income?
c. If government purchases increase to 420, what is the new equilibrium income? What is the multiplier for government purchases?
d. What level of government purchases is needed to achieve an income of 2,400? (Taxes remain at 400.)
e. What level of taxes is needed to achieve an income of 2,400? (Government purchases remain at 400.)
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