Question

In: Economics

A monopolistic firm has costs C = 160 + 16Q + .1Q2 and has the price...

  1. A monopolistic firm has costs C = 160 + 16Q + .1Q2 and has the price equation P = 48 - .4Q .
    1. Find the firm's profit-maximizing price.
    2. Find the firm's profit-maximizing quantity.
    3. What is the firm's profit?
    4. What is the firm's efficient scale of output?
    5. Why doesn't the firm produce at its efficient levels?

Solutions

Expert Solution

A)

The firm maximizes profit at MR=MC

Marginal revenue is the change in total revenue, and it is found by differentiation

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MC is the change in total cost, and it is found by the differentiation of the total cost

----------

equating the MC=MR

16+0.2Q=48-0.8Q

Q=32

the profit is maximum at the output level of 32 units.

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B)

The price is found by using the demand curve

P=48-0.4Q

P=48-0.4*32

P=35.2

the price is $35.2

------------------

C)

Profit =TR-TC

TR=P*Q=35.2*32

TR=1126.4

TC=160+16*32+0.1*(32^2)

TC=774.4

Profit=1126.4-774.4

=352

The profit is $352

----------------------------

D)

The efficient level of output is at MC=ATC

equating with MC

Q=40

the efficient level of output is 40 units

-----------------------

E)

The firm produces at MR=MC where Profit is maximum, and the efficient level of output is MC=ATC which is higher than it where

MC>MR

Q=40

MC=16+0.2*40

MC=$24

MR=48-0.8Q

Q=40

MR=48-0.8*40

MR=16

the marginal profit at an efficient level of output is

Marginal profit =MR-MC

=16-24

=-$8

the firm will lose $8 per unit if the firm produces at the efficient level of output.


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