题目内容

[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

[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

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

A. 对
B. 错

[判断]A firm will shut down in the short run if revenue is not sufficient to cover its variable costs of production.

A. 对
B. 错

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