1. (a) The following equations describe an economy: C-100 +0.75Yd 1-50-25r T-G-50 Where C is aggregate consumption, Y is disposable income, I is aggregate investment. I' is taxes, G is government purchases and r is the rate of interest. Derive the IS curve for the economy. Show the area of excess demand and excess supply in the goods market. (b) Draw the graph and explain the derivation of IS curve.

ENGR.ECONOMIC ANALYSIS
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Chapter1: Making Economics Decisions
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1. (a) The following equations describe an economy:
C-100+ 0.75Yd
I-50-25r
T-G-50
Where C is aggregate consumption, Y is disposable income, I is aggregate investment. I is
taxes, G is government purchases and r is the rate of interest. Derive the IS curve for the
economy. Show the area of excess demand and excess supply in the goods market.
(b) Draw the graph and explain the derivation of IS curve.
2. (a) Given the following data about the monetary sector of the economy:
Ma -0.4Y-80r
M₁ - 1200 million
Where, Ma is demand for money, Y is the level of income, r is the rate of interest and
M, is the supply of money.
Derive the equation for LM curve and give the economic interpretation of this curve.
Show the excess demand and excess supply in the money market.
(b) Draw the graph and explain the derivation of LM curve.
3. Consider the following economy:
C-100+ 0.8Yd
I-50-25,
G-T-50
M'
P
-200
M₁-Y-25r
1. Calculate the IS and LM curves.
2. Calculate the equilibrium levels of output (national income) and interest and draw the graph.
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Transcribed Image Text:1. (a) The following equations describe an economy: C-100+ 0.75Yd I-50-25r T-G-50 Where C is aggregate consumption, Y is disposable income, I is aggregate investment. I is taxes, G is government purchases and r is the rate of interest. Derive the IS curve for the economy. Show the area of excess demand and excess supply in the goods market. (b) Draw the graph and explain the derivation of IS curve. 2. (a) Given the following data about the monetary sector of the economy: Ma -0.4Y-80r M₁ - 1200 million Where, Ma is demand for money, Y is the level of income, r is the rate of interest and M, is the supply of money. Derive the equation for LM curve and give the economic interpretation of this curve. Show the excess demand and excess supply in the money market. (b) Draw the graph and explain the derivation of LM curve. 3. Consider the following economy: C-100+ 0.8Yd I-50-25, G-T-50 M' P -200 M₁-Y-25r 1. Calculate the IS and LM curves. 2. Calculate the equilibrium levels of output (national income) and interest and draw the graph. CS Scanned with CamScanner
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