What is a key feature of monopolistic competition?

Question

BlackTom AI · Accepted Answer

Monopolistic competition features many sellers offering differentiated products, so each firm has some discretion over price but faces close substitutes.

1) Relevant knowledge points and concepts
- Market structures: perfect competition (many firms, identical products, price takers), monopoly (single firm, price maker), oligopoly (few firms), monopolistic competition (many firms, product differentiation).
- Key attributes of monopolistic competition: many firms, differentiated (not identical) products, free entry and exit in the long run, some market power due to product differentiation, and a downward-sloping demand curve for each firm.

2) Step-by-step reasoning
Step 1: Compare each option to the defining attributes listed above.
Step 2: "Price Taker."—that implies firms accept market price with no pricing power, characteristic of perfect competition, not monopolistic competition.
Step 3: "Many firms sell identical products"—identical products implies no product differentiation; that describes perfect competition rather than monopolistic competition.
Step 4: "Only one firm controls the whole market"—this is the definition of a monopoly, not monopolistic competition.
Step 5: "Many firms sell similar but slightly different products."—this matches the defining feature of monopolistic competition: many competing firms, each differentiating its product (quality, branding, location), giving each firm some ability to set price.

3) Calculations
- No numerical calculation is required for this conceptual question.

4) Why the correct answer is correct
Product differentiation creates a small degree of market power: consumers may prefer one brand or version over another, so firms face downward-sloping demand curves and can charge different prices. Simultaneously, the presence of many firms and free entry keeps profits near zero in the long run, distinguishing this structure from monopoly or oligopoly.

5) Why the other options are incorrect
- "Price Taker." — describes perfect competition.
- "Many firms sell identical products" — also describes perfect competition.
- "Only one firm controls the whole market" — describes a monopoly.

6) Conclusion
The correct answer is "Many firms sell similar but slightly different products." This matches the provided answer.

What is a key feature of monopolistic competition?单项选择题

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