Q: What is the formula for total profit for a monopolistically competitive firm?

$$\pi = P \times q - ATC \times q$$

Question 1

Which of the following is NOT a source of product differentiation in monopolistic competition?

Accepted Answer

Perfect information about all products

Question 2

In a monopolistically competitive market, which statement is TRUE regarding the relationship between price and marginal cost at the profit-maximizing output?

Accepted Answer

$$P \u003e MC$$

Question 3

Suppose a firm in monopolistic competition faces a demand curve $$P = 32 - 0.2q$$ and a marginal cost curve $$MC = 0.4q. $$What is the profit-maximizing quantity?

Accepted Answer

$$q = 40$$

Question 4

Which of the following best describes the demand curve faced by a monopolistically competitive firm?

Accepted Answer

Downward sloping

Question 5

In monopolistic competition, why is marginal revenue always less than price?

Accepted Answer

Because increasing output requires lowering price for all units sold

Question 6

If a monopolistically competitive firm is earning positive economic profits in the short run, what will happen in the long run?

Accepted Answer

New firms will enter, reducing demand for existing firms until profits are zero

Question 7

Which formula correctly expresses profit per unit for a monopolistically competitive firm?

Accepted Answer

$$\pi = P - ATC$$

Question 8

A restaurant faces $$P = 32 - 0.2q$$, $$MC = 0.4q$$, and $$ATC = \frac{300}{q} + 0.2q. At $$the profit-maximizing output, what is the price charged?

Accepted Answer

$$P = 24$$

Question 9

In the long run, what is the relationship between price and average total cost in monopolistic competition?

Accepted Answer

$$P = ATC$$

Question 10

Which of the following statements about welfare in monopolistic competition is correct?

Accepted Answer

There is a deadweight loss compared to perfect competition

Question 11

If a monopolistically competitive firm faces $$MR \u003c MC at $$its current output, what should it do to maximize profit?

Accepted Answer

Decrease output

Question 12

Why do monopolistically competitive firms only operate in the elastic portion of the demand curve?

Accepted Answer

Because marginal revenue is positive only in the elastic portion

Question 13

Which of the following is a key difference between perfect competition and monopolistic competition?

Accepted Answer

Firms in monopolistic competition sell differentiated products

Question 14

If a monopolistically competitive firm’s total revenue is less than its variable cost, what should the firm do in the short run?

Accepted Answer

Shut down immediately

Question 15

What is the formula for total profit for a monopolistically competitive firm?

Accepted Answer

$$\pi = P 	imes q - ATC 	imes q$$

Question 16

Which of the following best explains why monopolistic competition is not allocatively efficient?

Accepted Answer

Because $$P \u003e MC at $$equilibrium

Question 17

A firm in monopolistic competition faces $$P = 32 - 0.2q$$ and $$MC = 0.4q. $$What is the price markup at the profit-maximizing output?

Accepted Answer

$$8$$

Question 18

Which of the following is TRUE about entry and exit in monopolistic competition?

Accepted Answer

Firms can easily enter or exit the market

Question 19

In monopolistic competition, what happens to the demand curve for an existing firm when new firms enter the market?

Accepted Answer

It shifts left and becomes flatter

Question 20

Which of the following is a real-world example of monopolistic competition?

Accepted Answer

Local restaurants

Monopolistic Competition: Structure, Pricing, and Welfare in Microeconomics

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