QCM : Market Structures and Competition — 9 questions

Questions et réponses du QCM

1. What is perfect competition?

A market with many firms selling differentiated products, each with some control over prices.
A market structure dominated by a single firm with high barriers to entry.
A market structure with many firms selling identical products where no single firm can influence the market price.
A market with a few large firms that collude to set prices and output.

A market structure with many firms selling identical products where no single firm can influence the market price.

Explication

Perfect competition is defined as a market structure characterized by many small firms selling identical (homogeneous) products, where no single firm has the power to influence the market price. Firms are price takers, and there are no barriers to entry or exit. This leads to an efficient allocation of resources and maximum consumer welfare under the assumptions of perfect information and free entry.

2. What is a defining characteristic of a perfectly competitive market in terms of product type?

Products are differentiated across sellers.
Products are homogeneous and identical.
Products are differentiated, but prices are fixed by the government.
Products are unique to each firm with no close substitutes.

Products are homogeneous and identical.

Explication

Perfect competition features homogeneous, identical products, which means consumers see no difference between the products from different sellers; this is crucial for firms being price takers.

3. What is the defining feature of firms operating in monopolistic competition?

Product differentiation that makes their products unique and distinct.
A single firm dominating the entire market with no close substitutes.
High barriers to entry that prevent new firms from entering the market.
Homogeneous products that are identical across firms.

Product differentiation that makes their products unique and distinct.

Explication

The defining feature of monopolistic competition is product differentiation, where firms make their products distinct through branding, quality, or features. This gives them some market power and results in downward-sloping demand curves. The other options describe features of other market structures: high barriers to entry are typical of monopolies and oligopolies, homogeneous products are characteristic of perfect competition, and a single firm dominating the market describes a monopoly.

4. According to the revision sheet, what happens to supernormal profits and losses in the long run under perfect competition?

Supernormal profits are sustained indefinitely.
Firms continue to make losses until the market collapses.
Entry and exit ensure profits tend towards zero over time.
Supernormal profits become permanent, attracting more firms indefinitely.

Entry and exit ensure profits tend towards zero over time.

Explication

In the long run, free entry and exit drive profits to zero in perfect competition, ensuring firms earn only normal profits, which cover costs but do not provide excess profit.

5. What is the primary role of interdependence among firms in an oligopoly?

To allow firms to collude openly and set prices collectively
To prevent any form of competition and establish a monopoly
To influence firms' strategic decision-making to maximize profits while considering competitors' reactions
To enable firms to operate independently without considering competitors' actions

To influence firms' strategic decision-making to maximize profits while considering competitors' reactions

Explication

In an oligopoly, firms are interdependent because each firm's decision on pricing and output affects and is affected by the decisions of other firms. This strategic interdependence influences their behavior, often leading to competitive or collusive strategies aimed at maximizing profits while avoiding destructive price wars. This is a defining feature of oligopolistic markets, distinguishing them from other market structures.

6. Which of the following is true about the equilibrium in perfect competition?

Price equals average total cost (P = ATC).
Price equals marginal cost (P = MC).
Price is set by the government.
Price is higher than marginal cost at equilibrium.

Price equals marginal cost (P = MC).

Explication

In long-run perfect competition, equilibrium occurs where P = MC and P = ATC, ensuring allocative and productive efficiency.

7. What is a common assumption in perfect competition that rarely holds true in real markets?

Firms have perfect information about market prices and product quality.
Firms can differentiate their products significantly.
Barriers to entry are high and prevent new firms from entering.
Firms can influence the market price to their advantage.

Firms have perfect information about market prices and product quality.

Explication

Perfect competition assumes perfect information, which is an idealized condition; in reality, information asymmetry often exists.

8. How does monopolistic competition differ from perfect competition in terms of product offerings?

Products are homogeneous in monopolistic competition.
Products are highly differentiated in monopolistic competition.
Products are mandated to be identical by regulation in monopolistic competition.
Products must be completely unique with no close substitutes in monopolistic competition.

Products are highly differentiated in monopolistic competition.

Explication

In monopolistic competition, product differentiation is key, giving firms some control over prices, unlike the homogeneous products in perfect competition.

9. Why do firms in monopolistic competition engage in non-price competition?

Because they face a downward-sloping demand curve and can differentiate their products.
Because they operate in markets with perfect information.
Because there are high barriers to entry that prevent new competitors.
Because they are functionally identical to firms in perfect competition.

Because they face a downward-sloping demand curve and can differentiate their products.

Explication

Firms in monopolistic competition compete through advertising, branding, and other non-price strategies due to product differentiation and a downward-sloping demand curve.

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Perfect Competition — definition?

Many small firms, identical products, no market influence.

Perfect Competition — key feature?

Many firms, identical products, price takers

Monopolistic Competition — role?

Many firms, differentiated products, some pricing power.

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