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Naily [24]
3 years ago
7

Desired consumption is Cd = 100 + 0.8Y - 500r - 0.5G, and desired investment is Id = 100 - 500r. Real money demand is Md/P = Y -

2000i. Other variables are πe = 0.05, G = 200, Y (Full output level) = 1000, and M = 2100. (a) Find the equilibrium values of the real interest rate, consumption, investment, and the price level. (b) Suppose the money supply increases to 2800. Find the equilibrium values of the real interest rate, consumption, investment, and the price level. (Assume that the expected inflation rate is unchanged.)
Business
1 answer:
allochka39001 [22]3 years ago
4 0

Answer:

Under a) r=0.1;Id=50;Cd=750;P=7 b) P only changes and is now 9.33

Explanation:

a)  In a closed economy national savings are equal to investments or:

S d = I d = Y - Cd - G

Id = Y - 100 - 0.8*Y + 500*r - 0.5*G

100 - 500*r = 0.2*Y -100 + 500*r -0.5*G

200 - 1000*r = 0.2*1000 - 0.5*200=100

-1000*r=-100

r= 0.1

i = 0.15

Id = 100 -50 =50

Cd= 100 + 800 - 50 - 100=750

P = Md/Y-2000 i

P= 2100/1000 -300=7

b) If money supply increases to 2800, the price level would be:

P = 2800/Y - 2000*i = 2800/Y- 2000*(i-inflation)

However, since the variables determining real interest rate remained the same, r is also the same or 0.1 and i is 0.15. Consumption and investment remain the same, only price level changes or:

P=9.33  

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