1. Which of the following best describes the efficiency of monopolistically competitive firms?

a. Allocatively efficient by productively inefficient.
b. Allocatively inefficient but productively efficient.
c. Both allocatively efficient and productively efficient.
d. Neither allocatively efficient nor productively efficient.

Question

1. Which of the following best describes the efficiency of monopolistically competitive firms?

a.     Allocatively efficient by productively inefficient.
b.     Allocatively inefficient but productively efficient.
c.     Both allocatively efficient and productively efficient.
d.     Neither allocatively efficient nor productively efficient.

BlackTom AI · Accepted Answer

In monopolistic competition firms face a downward-sloping demand curve and choose output where marginal revenue (MR) equals marginal cost (MC); price is then read off the demand curve and lies above MR. 1. Relevant knowledge points and concepts - Profit maximization: firms set output where MR = MC and charge the price from the demand curve. - Allocative efficiency: occurs when P = MC (price equals marginal cost). - Productive efficiency: occurs when output is at the minimum point of average total cost (ATC). - Monopolistic competition characteristics: many firms, product differentiation, free entry/exit in the long run, downward-sloping demand for each firm. 2. Step-by-step reasoning - Step 1: A monopolistically competitive firm maximizes profit by producing Q where MR = MC. - Step 2: Because the demand curve is downward sloping, the price the firm charges (from the demand curve at that Q) is greater than MR and therefore greater than MC: P > MC. - Step 3: In the long run, free entry eliminates economic profit so firms produce where P = ATC, but this equilibrium quantity is to the left of the minimum of ATC (firms have excess capacity). - Step 4: Therefore at long-run equilibrium P = ATC > MC and Q < Qmin(ATC). 3. Calculations / intermediate comparisons - Profit-max rule: MR = MC -> choose Q* - Price: P = demand(Q*) -> P > MR = MC, so P > MC. - Productive efficiency check: Q* < Qmin where ATC is minimized, so not producing at minimum ATC. 4. Why the correct answer is correct - Allocative efficiency fails because P > MC (resources are underallocated relative to the social optimum). - Productive efficiency fails because firms do not produce at the minimum of ATC (they have excess capacity). 5. Why other options are incorrect - (a) says allocatively efficient but productively inefficient: wrong because allocative efficiency would require P = MC, which does not hold. - (b) says allocatively inefficient but productively efficient: wrong because productively efficient would require production at minimum ATC, which does not occur. - (c) says both efficient: wrong on both counts for reasons above. 6. Conclusion Monopolistically competitive firms are neither allocatively efficient nor productively efficient; therefore the correct choice is d. This matches the provided answer.

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