Q: Which of the following equations correctly represents the concentration ratio (CR4) for an industry, and what does a high value (e.g., $$CR4 \approx 93.5\%) $$indicate?

$$CR4 = \frac{\text{Sales of 4 largest firms}}{\text{Total industry sales}} \times 100$$

Question 1

Which of the following best explains why the non-alcoholic beverage industry, as discussed in the Celsius case, is considered an oligopoly?

Accepted Answer

Because a few large firms dominate the market, and each firm must consider the likely reactions of its rivals when making strategic decisions.

Question 2

Suppose Celsius increases its advertising budget to expand its market share. According to oligopoly theory, what is the most likely response from its main competitors, Monster and Red Bull?

Accepted Answer

They will likely respond with their own increases in advertising or product differentiation to protect their market shares.

Question 3

Which of the following is NOT a barrier to entry in the AI semiconductor industry, as illustrated by Nvidia’s market position?

Accepted Answer

Perfectly elastic demand for all chip products.

Question 4

In the context of the Nvidia case, what does it mean for Nvidia to be a 'dominant firm' in an oligopoly?

Accepted Answer

Nvidia has a large market share and technological leadership, influencing the behavior of other firms, but still faces strategic interdependence.

Question 5

Which of the following best describes the role of product differentiation in monopolistic competition, as seen in the Publix vs. Kroger example?

Accepted Answer

It allows firms to have some market power by making their products or services unique, leading to a downward-sloping demand curve.

Question 6

If Publix’s entry into a new market causes Kroger to lower its prices and improve service, which economic concept does this best illustrate?

Accepted Answer

Increased competition leads to improved consumer welfare through lower prices and better choices.

Question 7

Consider the following scenario: Nvidia invests heavily in new chip production based on optimistic forecasts of AI demand. If actual demand falls short, what is the most likely economic outcome in the context of oligopoly?

Accepted Answer

Excess capacity may result, leading to lower prices and reduced profitability for all major firms.

Question 8

Which of the following equations correctly represents the concentration ratio (CR4) for an industry, and what does a high value (e.g., $$CR4 \approx 93.5\%) $$indicate?

Accepted Answer

$$CR4 = \frac{	ext{Sales of 4 largest firms}}{	ext{Total industry sales}} 	imes 100$$

Question 9

Which of the following best explains why advertising can be both a source of increased demand and a barrier to entry in oligopolistic markets?

Accepted Answer

Heavy advertising by established firms raises brand awareness, increases consumer loyalty, and makes it more difficult for new entrants to compete.

Question 10

Suppose the grocery industry in a particular city is dominated by three major chains. Which market structure does this most closely resemble, and why?

Accepted Answer

Oligopoly, because a small number of firms dominate and closely monitor each other’s strategies.

Question 11

Which of the following is a real-world example of strategic interdependence in an oligopoly?

Accepted Answer

Nvidia anticipates that AMD will accelerate its chip development if Nvidia launches a new product, so Nvidia adjusts its own innovation timeline accordingly.

Question 12

Which of the following best describes the Nash equilibrium in the context of oligopolistic competition?

Accepted Answer

Each firm chooses its best strategy, taking into account the likely responses of its rivals, and no firm can improve its outcome by unilaterally changing its own strategy.

Question 13

If the demand curve facing a monopolistically competitive firm is more elastic than that facing a monopolist, what does this imply about the firm’s pricing power?

Accepted Answer

The firm has less pricing power because consumers are more responsive to price changes.

Question 14

Which of the following is an example of a technological barrier to entry in the AI chip industry?

Accepted Answer

Nvidia’s proprietary CUDA software ecosystem, which makes it costly for customers to switch to competitors.

Question 15

Suppose government policy imposes export controls on advanced chips. What is the most likely effect on the global AI chip oligopoly?

Accepted Answer

It may alter the competitive balance by restricting market access and affecting firms’ strategies.

Question 16

If the market for energy drinks is characterized by a high concentration ratio, significant advertising, and strong brand loyalty, which market structure does it most closely resemble?

Accepted Answer

Oligopoly

Question 17

Which of the following best explains why the definition of the market (broad vs. narrow) affects whether the grocery industry is seen as monopolistic competition or oligopoly?

Accepted Answer

A broad definition includes many firms and product differentiation, resembling monopolistic competition; a narrow definition may reveal only a few dominant firms, resembling oligopoly.

Question 18

Which of the following is a multi-step example of strategic behavior in an oligopoly?

Accepted Answer

Celsius increases advertising, anticipating that Monster will respond with a new product line, which then leads Celsius to adjust its pricing strategy.

Question 19

Which of the following best describes the effect of economies of scale in oligopolistic industries?

Accepted Answer

They lower average costs for large firms, making it difficult for new entrants to compete.

Oligopoly and Monopolistic Competition: Real-World Applications and Strategic Behavior

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