CEA - Certified Economic Analyst Market Structures and Competition Questions and Answers — Questions and Answers
Question 1: Which of the following best describes the long-run equilibrium for a typical firm in a monopolistically competitive market?
- The firm earns positive economic profits and operates at the minimum point of its average total cost curve.
- The firm earns zero economic profit, and its price is equal to its marginal cost.
- The firm earns zero economic profit, but its price is greater than its marginal cost. (Correct answer)
- The firm earns positive economic profits because of significant barriers to entry.
Correct answer: The firm earns zero economic profit, but its price is greater than its marginal cost.
In long-run equilibrium, free entry into a monopolistically competitive market drives economic profits down to zero (Price = Average Total Cost). However, because the firm faces a downward-sloping demand curve due to product differentiation, the profit-maximizing point (where MR=MC) occurs at an output level where price is greater than marginal cost, leading to allocative inefficiency.
Question 2: An industry is characterized by very high fixed costs and continuously declining average costs as output increases, such that one firm can supply the entire market at a lower cost than multiple firms. This situation is known as a:
- Cartel
- Natural monopoly (Correct answer)
- Government-granted monopoly
- Perfectly competitive market
Correct answer: Natural monopoly
A natural monopoly arises when there are extensive economies of scale, meaning the average cost per unit of production falls as output increases. This cost structure, typically involving high fixed costs (like infrastructure), makes it more efficient for a single firm to serve the entire market.
Question 3: The kinked demand curve model of oligopoly is used to explain which market phenomenon?
- Frequent price wars among firms.
- The process of forming a successful cartel.
- Price rigidity, where firms are hesitant to change prices. (Correct answer)
- Achieving long-run productive efficiency.
Correct answer: Price rigidity, where firms are hesitant to change prices.
The kinked demand curve model assumes that if a firm raises its price, rivals will not follow, leading to a large loss in market share (elastic demand). Conversely, if a firm lowers its price, rivals will match the cut to protect their market share, leading to only a small gain in quantity sold (inelastic demand). This asymmetry creates a 'kink' in the demand curve and makes firms reluctant to change prices, leading to price stability or rigidity.
Question 4: Which of the following market structures is characterized by achieving both allocative efficiency (P=MC) and productive efficiency (P=minimum ATC) in the long run?
- Monopoly
- Oligopoly
- Perfect Competition (Correct answer)
- Monopolistic Competition
Correct answer: Perfect Competition
Perfect competition is the only market structure that achieves both allocative and productive efficiency in long-run equilibrium. Fierce competition forces firms to produce at the lowest possible average total cost (productive efficiency) and to set a price equal to their marginal cost (allocative efficiency). Other structures fail on one or both counts due to market power.
Question 5: Firms in a monopolistically competitive industry, such as local restaurants or coffee shops, primarily compete with each other through which of the following strategies?
- Forming collusive agreements to set a single market price.
- Producing a standardized, homogeneous product at the lowest possible cost.
- Lobbying the government for exclusive production patents.
- Differentiating their products through branding, quality, service, and location. (Correct answer)
Correct answer: Differentiating their products through branding, quality, service, and location.
The hallmark of monopolistic competition is product differentiation. Firms create distinct identities for their products or services through branding, design, quality, customer service, or location to attract customers and gain some market power. This is how they compete, rather than solely on price.
Question 6: Consider the following payoff matrix for two firms, Firm A and Firm B, which must decide simultaneously whether to set a High Price or a Low Price. The payoffs represent profits (in millions). What is the Nash Equilibrium for this game? | | Firm B: High Price | Firm B: Low Price | | :--- | :--- | :--- | | **Firm A: High Price** | A: $100, B: $100 | A: $20, B: $120 | | **Firm A: Low Price** | A: $120, B: $20 | A: $50, B: $50 |
- Both firms choosing a High Price.
- Firm A chooses High Price, Firm B chooses Low Price.
- Both firms choosing a Low Price. (Correct answer)
- Firm A chooses Low Price, Firm B chooses High Price.
Correct answer: Both firms choosing a Low Price.
A Nash Equilibrium occurs when no player can benefit by unilaterally changing their strategy, given the other player's choice. Let's analyze: 1. If Firm B chooses High Price, Firm A's best move is to choose Low Price ($120 > $100). 2. If Firm B chooses Low Price, Firm A's best move is to choose Low Price ($50 > $20). Firm A has a dominant strategy: Low Price. 3. If Firm A chooses High Price, Firm B's best move is to choose Low Price ($120 > $100). 4. If Firm A chooses Low Price, Firm B's best move is to choose Low Price ($50 > $20). Firm B also has a dominant strategy: Low Price. Since both firms' dominant strategy is to choose Low Price, the Nash Equilibrium is (Low Price, Low Price), with a payoff of $50 million for each.
CEA - Certified Economic Analyst Market Structures and Competition Questions and Answers
Which of the following best describes the long-run equilibrium for a typical firm in a monopolistically competitive market?