Assume that GDP (Y ) is 5,000 in a closed economy. Consumption (C) is given by the equation C = 1,200 + 0.6(Y −T)−100r, where r is the real interest rate, in percent. Investment (I) is given

MACROECONOMICS
14th Edition
ISBN:9781337794985
Author:Baumol
Publisher:Baumol
Chapter9: Demand-side Equilibrium: Unemployment Or Inflation?
Section9.A: The Simple Algebra Of Income Determination And The Multiplier
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Assume that GDP (Y ) is 5,000 in a closed economy. Consumption (C) is given by the equation
C = 1,200 + 0.6(Y −T)−100r, where r is the real interest rate, in percent. Investment (I) is given
by the equation I = 2,000 − 200r. Taxes (T) are 1,000, and government spending (G) is 1,500.
(a) What are the equilibrium values of C, I, and r? 
(b) What are the values of private saving, public saving, and national saving? 
(c) For the given consumption function, what does the relationship between consumption and the
interest rate imply about the saving schedule?

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