Question 1

Which of the following best describes a market structure characterized by monopolistic competition?

Accepted Answer

A market with a large number of firms, each producing a slightly differentiated product, and free entry and exit.

Question 2

Suppose a market has four firms with market shares of 40%, 30%, 20%, and 10%. Calculate the Herfindahl-Hirschman Index (HHI) for this market.

Accepted Answer

$HHI = 40^2 + 30^2 + 20^2 + 10^2 = 1600 + 900 + 400 + 100 = 3000$

Question 3

In the long run, what happens to economic profit in a monopolistically competitive market?

Accepted Answer

Firms earn zero economic profit as entry of new firms drives profit down.

Question 4

Which of the following is NOT a characteristic of monopolistic competition?

Accepted Answer

Collusion among firms to set prices

Question 5

A firm in monopolistic competition maximizes profit by producing the quantity where:

Accepted Answer

$MR = MC$

Question 6

Why do firms in monopolistic competition engage in advertising and develop brand names?

Accepted Answer

To signal product quality and differentiate their products from competitors.

Question 7

If a firm in monopolistic competition is producing at a quantity where $P > ATC$, what does this indicate in the short run?

Accepted Answer

The firm is earning an economic profit.

Question 8

Which of the following best explains why firms in monopolistic competition have excess capacity in the long run?

Accepted Answer

The downward-sloping demand curve for their differentiated products leads them to produce less than the efficient scale.

Question 9

Which statement about the efficiency of monopolistic competition is correct?

Accepted Answer

In the long run, price exceeds marginal cost, so less than the efficient quantity is produced.

Question 10

Suppose a firm in monopolistic competition spends heavily on advertising. What is a likely effect if all firms in the industry do the same?

Accepted Answer

The demand for each firm's product becomes more elastic, leading to a lower markup.

Question 11

Which of the following is a limitation of using concentration measures like the four-firm concentration ratio or HHI to determine market structure?

Accepted Answer

They do not account for the geographical scope of the market.

Question 12

A firm in monopolistic competition will continue to develop new products as long as:

Accepted Answer

The marginal revenue from innovation exceeds the marginal cost of innovation.

Question 13

Which of the following equations correctly represents the markup for a firm in monopolistic competition?

Accepted Answer

$	ext{Markup} = P - MC$

Question 14

If the four-firm concentration ratio in an industry is 55%, what does this suggest about the market structure?

Accepted Answer

The market is likely to be monopolistically competitive.

Question 15

Which of the following best describes the role of brand names in monopolistic competition?

Accepted Answer

They provide information about product quality and consistency to consumers.

Question 16

A pizza restaurant in a monopolistically competitive market is considering a new advertising campaign. Which of the following is a possible outcome?

Accepted Answer

The campaign increases demand for its pizza, raising total revenue, but also increases average total cost due to higher fixed costs.

Question 17

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

Accepted Answer

$P = ATC > MC$

Question 18

Which of the following is true about selling costs such as advertising in monopolistic competition?

Accepted Answer

They are fixed costs that increase average total cost but do not affect marginal cost.

Question 19

Why might a high-quality firm spend millions on advertising even if everyone already knows its product?

Accepted Answer

To signal quality to consumers and differentiate itself from lower-quality competitors.

Question 20

Which of the following best explains why product variety in monopolistic competition is both valued and costly?

Accepted Answer

Product variety increases consumer satisfaction but also raises production and marketing costs.

Monopolistic Competition: Structure, Pricing, and Marketing in Microeconomics

Study Guide - Practice Questions