Question 1

Which of the following best describes monopolistic competition?

Accepted Answer

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

Question 2

In monopolistic competition, what is the main reason firms engage in advertising and branding?

Accepted Answer

To signal high quality and differentiate their products from competitors.

Question 3

Suppose a market has four firms with market shares of 40%, 30%, 20%, and 10%. What is 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 4

Which condition must be met for a firm in monopolistic competition to maximize profit in both the short run and long run?

Accepted Answer

$$MR = MC$$

Question 5

Why do firms in monopolistic competition earn zero economic profit in the long run?

Accepted Answer

Because free entry and exit drive price down to average total cost.

Question 6

A firm in monopolistic competition is producing at a point where $$P \u003e ATC. $$What will likely happen in the long run?

Accepted Answer

New firms will enter, reducing demand for the existing firm's product until $$P = ATC.$$

Question 7

Which of the following is a limitation of using concentration measures to determine market structure?

Accepted Answer

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

Question 8

In long-run equilibrium, how does the output of a firm in monopolistic competition compare to the efficient scale?

Accepted Answer

It produces less than the efficient scale, operating with excess capacity.

Question 9

Which equation represents the markup for a firm in monopolistic competition?

Accepted Answer

$$Markup = P - MC$$

Question 10

If a market has an HHI of 1,800, how would economists classify this market?

Accepted Answer

Competitive—monopolistic competition

Question 11

Which of the following best explains why advertising can lower average total cost for a firm in monopolistic competition?

Accepted Answer

Advertising increases demand, allowing the firm to produce more and spread fixed selling costs over a larger output.

Question 12

Which statement about the efficiency of monopolistic competition is correct?

Accepted Answer

In the long run, price exceeds marginal cost, so marginal social benefit exceeds marginal social cost.

Question 13

A firm in monopolistic competition is considering a new product innovation. What is the efficient amount of innovation?

Accepted Answer

Where the marginal social benefit equals the marginal social cost.

Question 14

Why might a firm in monopolistic competition continuously develop new products?

Accepted Answer

To temporarily gain a competitive edge and earn economic profit before competitors imitate the innovation.

Question 15

If all firms in a monopolistically competitive market begin advertising, what is the likely effect on the demand curve for each firm's product?

Accepted Answer

The demand curve becomes more elastic, leading to a lower price and smaller markup.

Question 16

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

Accepted Answer

Firms produce identical products.

Question 17

A firm in monopolistic competition faces a downward-sloping demand curve. What does this imply about its pricing power?

Accepted Answer

The firm has some control over price due to product differentiation.

Question 18

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

Accepted Answer

Brand names provide information about quality and consistency, helping consumers make choices.

Question 19

Suppose a firm in monopolistic competition is deciding how much to spend on advertising. What is the profit-maximizing rule for advertising expenditure?

Accepted Answer

Spend on advertising until the marginal revenue from advertising equals the marginal cost of advertising.

Monopolistic Competition: Structure, Pricing, and Marketing in Microeconomics

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