Managerial economics short run production
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Managerial Economics Short-Run Production. Suppose that a firm is currently employing 20 workers, the only variable input, at a wage rate of $60. The average product of labor is 30, the last worker added 12 units to total output, and total fixed cost is $3,600. What is marginal cost?

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Managerial Economics Short-Run Production

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Managerial economics short run production

Managerial Economics Short-Run Production

Suppose that a firm is currently employing 20 workers, the only variable input, at a wage rate of $60. The average product of labor is 30, the last worker added 12 units to total output, and total fixed cost is $3,600.

What is marginal cost?

What is average variable cost?

How much output is being produced?

What is average total cost?

Is average variable cost increasing, constant, or decreasing? What about average total cost?

Dr. C. Chen


Managerial economics short run production1

Managerial Economics Short-Run Production

Suppose that a firm is currently employing 20 workers, the only variable input, at a wage rate of $60. The average product of labor is 30, the last worker added 12 units to total output, and total fixed cost is $3,600.

a. What is marginal cost?

The last worker (hired at the wage of $60, TC=$60) added 12 units of output (Q =12) MC=TC/ Q = $60/12=$5

b. What is average variable cost?

AVC = VC/Q = $60*20/30*20 = $2

Dr. C. Chen


Managerial economics short run production2

Managerial Economics Short-Run Production

Suppose that a firm is currently employing 20 workers, the only variable input, at a wage rate of $60. The average product of labor is 30, the last worker added 12 units to total output, and total fixed cost is $3,600.

c. How much output is being produced?

Q = 30*20 = 600

d. What is average total cost?

ATC= TC/Q = (FC+VC)/Q = ($3,600+$60*20)/600 =$8

Dr. C. Chen


Managerial economics short run production3

Managerial Economics Short-Run Production

Suppose that a firm is currently employing 20 workers, the only variable input, at a wage rate of $60. The average product of labor is 30, the last worker added 12 units to total output, and total fixed cost is $3,600.

e. Is average variable cost increasing, constant, or decreasing? What about average total cost?

From the previous answers, we know that

ATC ($8) > MC ($5) > AVC ($2). So, AVC is increasing but ATC is decreasing. On the next slide, ATC > MC > AVC occurs between Q2 and Q3.

Dr. C. Chen


Short run average marginal cost curves figure 8 5

Short Run Average & Marginal Cost Curves (Figure 8.5)


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