Question

Consider the following numerical example of the IS-LM model:

C = 100 + 0.3YD

I = 150 + 0.2Y - 1000*i*

T = 100

G = 200

i = 0.01

a) What is the equilibrium level out output (Y)?

b) suppose the government increase spending to G=300. What is the new equilibrium level out output?

c) G = 200. What is the equilibrium supply of money id the
demand for money is given by (M/P)d = 2Y - 4000*i*?

Answer #1

4.Consider the following IS-LM model:
C = 200+0.5 YD
I = 150+0.25Y-1000i
G=250
T=200
(M/P)d = 2Y-8000i
M/P=1600
a. Derive the IS relation
b. Derive the LM relation
c. Solve for the equilibrium real output.
d. Solve for the equilibrium interest rate.

In the Keynesian Model assume the following information:
C=1000+0.5Yd I=300 G=200 T=100 here Yd=Y-T. Note that I, G, T,
represents private investment, Government spending and Taxes,
respectively. What are: (i) the total injections and (ii) total
leakages What is the equilibrium level of income, consumption, and
saving and disposable income Assume that the level of output is
1200 how does the economy adjust to equilibrium, specifically
mention inventory levels. Suppose private investment will decrease
by 150, by how much the...

Question 1
By relying on the IS LM Model explain what will be the effect of
a tax cut policy on the equilibrium level of income. Explain in
detail the different steps, how does this policy impact the
investment?
Question 2
Keynesian economics assume that prices are sticky (they do not
change) in the short run. It is an assumption shared by classical
economics. Explain briefly what are the characteristics of
classical economists and according to them what drives the...

2) Consider the following Keynesian model of the economy.
Consumption Function: C = 12 + .6 Y d,
Investment Function: I = 25 − 50 r,
Government Spending: G = 20,
Tax Collections: T = 20,
Money Demand Function: L d = 2 Y − 200 r,
Money Supply: M = 360,
Price Level: P = 2.
a) Find an expression for the IS curve and plot it.
b) Find an expression for the LM curve and plot it.
c)...

Consider the following IS-LM model:
C=400+0.25YD
I=300+0.25Y-1500r
G=600
T=400
(M/P)D=2Y-1200r
(M/P)=3000
1-Derive the IS relation with Y on the left-hand side.
2-Derive the LM relation with r on the left-hand side.
3-Solve for equilibrium real output.
4-Solve for the equilibrium interest rate.
5-Solve for the equilibrium values of C, and I, and verify the
value you obtained for Y adding C, I and G.
6-Now suppose that the money supply increases to M/P=4320. Solve
for Y, r, C and I...

3. The IS-LM Model
Consider an economy characterized by the following equations for
consumption (C), investment (I), government spending (G), taxes
(T), aggregate demand (Z), output (Y), and the interest rate
(i):
C = 54 + 0.3*(Y – T)
I = 16 + 0.1*Y – 300*i
G = 35
T = 30
Z = C + I + G
i = ?
Suppose the central bank has set the interest rate equal to 2%
(this is, ? = 0.02).
a)...

Suppose that economy of Portugal is characterized by the
following C = 200 + 0.5 (Y - T) Represents the consumption function
I = 600 – 30 r represents the investment function G = 300
represents the public spending T = 300 represents the level of
taxation (m/p)d = y - 40 r represents the money demand function
(m/p)s = 1500 r represents the real money supply d Y represents the
global output Find the IS curve the LM curve...

3. The IS-LM Model
Consider an economy characterized by the following equations for
consumption (C), investment (I), government spending (G), taxes
(T), aggregate demand (Z), output (Y), and the interest rate
(i):
C = 54 + 0.3*(Y – T)
I = 16 + 0.1*Y – 300*i
G = 35
T = 30
Z = C + I + G
i = ?
Suppose the central bank has set the interest rate equal to 2%
(this is, ? = 0.02).
a)...

Suppose desired consumption and desired investment are
?? = 300 + 0.75(? − ?) − 300?
T = 100 + 0.2Y
?? = 200 − 200?
G is the level of government purchases and G=600
Money demand is
?? ?
= 0.5? − 500(? + ??)
where the expected rate of inflation, ??, is 0.05. The nominal
supply of money M = 133,200.
Suppose the full employment output is 2500 and the price level in
the short run is 120....

IS-LM Model (Closed Economy)
The following equations describe a small open economy.
[Figures are in millions of dollars; interest rate (i) is in
percent]. Assume that the price level is fixed.
Goods Market
Money
Market
C = 250 +
0.8YD
L = 0.25Y – 62.5i
YD = Y + TR –
T
Ms/P = 250
T = 100 + 0.25Y
I = 300 – 50i
G = 350; TR = 150
Goods market equilibrium condition: Y = C + I...

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