题目内容

[单选]Tommy's Tires operates in a perfectly competitive market. If tires sell for $50 each and average total cost per tire is $40 at the profit-maximizing output level, then in the long run

A. more firms will enter the market.
B. some firms will exit from the market.
C. the equilibrium price per tire will rise.
D. average total costs will fall.

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[单选]In the long-run equilibrium of a market with free entry and exit, marginal firms are operating

A. at the point where average variable cost equals marginal cost.
B. at the minimum point on their marginal cost curves.
C. at their efficient scale.
D. where accounting profit is zero.

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[判断]For a firm operating in a perfectly competitive industry, total revenue, marginal revenue, and average revenue are all equal.

A. 对
B. 错

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[判断]Because there are many buyers and sellers in a perfectly competitive market, no one seller can influence the market price.

A. 对
B. 错

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[判断]Because nothing can be done about sunk costs, they are irrelevant to decisions about business strategy.

A. 对
B. 错

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[单选]Tommy's Tires operates in a perfectly competitive market. If tires sell for $50 each and average total cost per tire is $40 at the profit-maximizing output level, then in the long run

A. more firms will enter the market. B. some firms will exit from the market. C. the equilibrium price per tire will rise. D. average total costs will fall.

[单选]In the long-run equilibrium of a market with free entry and exit, marginal firms are operating

[判断]For a firm operating in a perfectly competitive industry, total revenue, marginal revenue, and average revenue are all equal.

[判断]Because there are many buyers and sellers in a perfectly competitive market, no one seller can influence the market price.

[判断]Because nothing can be done about sunk costs, they are irrelevant to decisions about business strategy.

A. more firms will enter the market.
B. some firms will exit from the market.
C. the equilibrium price per tire will rise.
D. average total costs will fall.