Tuesday, January 26, 2010

ECO 401 Correct Sol

 
Q: 1

Ans:

Part A:

a. Explicit cost of the firm = wages + interest + rent
         = 250,000 + 55,430 + 74,320
  
Total = 379,750$

                                                           
b. Implicit cost of the firm = 44,500 + 16,600
                                 
                          Total= 61,100$


c. Total cost of the firm = explicit cost + implicit cost
                 = 379,750 + 61,100
                 
Total         = 440,850$


Part B:

If the value of multiplier is 2.49 then

Total profit = total revenue – total cost
                  
                    = 495,680 – 440,850

Total profit =            54,830$


Part C:

Total profit = total revenue – total cost
                  
       = 413,934 – 440,850

Total loss =           26,916$


Q 2:

Ans:

Part A:

a:   K = 1/1-MPC

K = 1/1-0.39

K = 1.64


b:   K = 1/MPS

K = 1/0.64

K = 1.56


Part B:

a:    K = 1/1-MPC

Adjusting the equation:

K (1 – MPC) = 1

1 – MPC = 1/K

MPC = 1 – 1/K

MPC = 1 – 1/2.49

MPC = 0.60


     b:    K = 1/MPS

adjusting the equation:

MPS = 1/K

MPS = 1/2.49

MPS = 0.40


Part C:
There is a direct relationship between MPC and the value of multiplier. If the MPC is higher, the size of multiplier would be high and vice versa.

Part D:

Change in investment = ΔI = 25$

MPC = 0.75

First we would find the value of multiplier

K = 1/1-MPC

K = 1/1-0.75

K = 4

As, K = Δy (change in income) / ΔI (change in investment)

K * Δ I = Δ y

4 * 25 = Δ y

Δ y = 100$



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