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In the long run, a firm will enter a competitive industry if


A) total revenue exceeds total cost.
B) the price exceeds average total cost.
C) the firm can earn economic profits.
D) All of the above are correct.

E) A) and B)
F) A) and C)

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Which of the following firms is the closest to being a perfectly competitive firm?


A) the New York Yankees
B) Apple, Inc.
C) DeBeers diamond wholesalers
D) a wheat farmer in Kansas

E) A) and B)
F) A) and C)

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For a firm in a competitive market, an increase in the quantity produced by the firm will result in


A) a decrease in the product's market price.
B) an increase in the product's market price.
C) no change in the product's market price.
D) either an increase or no change in the product's market price depending on the number of firms in the market.

E) A) and D)
F) B) and C)

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If a competitive firm is currently producing a level of output at which marginal revenue exceeds marginal cost, then


A) a one-unit increase in output will increase the firm's profit.
B) a one-unit decrease in output will increase the firm's profit.
C) total revenue exceeds total cost.
D) total cost exceeds total revenue.

E) C) and D)
F) A) and D)

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Figure 14-12 -Refer to Figure 14-12. If the figure in panel (a) reflects the long-run equilibrium of a profit-maximizing firm in a competitive market, the figure in panel (b) most likely reflects Figure 14-12 -Refer to Figure 14-12. If the figure in panel (a)  reflects the long-run equilibrium of a profit-maximizing firm in a competitive market, the figure in panel (b)  most likely reflects   A)  perfectly inelastic long-run market supply. B)  perfectly elastic long-run market supply. C)  the entry of firms into the industry when some resources used in production are available only in limited quantities. D)  the fact that zero profits cannot be sustained in the long run.


A) perfectly inelastic long-run market supply.
B) perfectly elastic long-run market supply.
C) the entry of firms into the industry when some resources used in production are available only in limited quantities.
D) the fact that zero profits cannot be sustained in the long run.

E) A) and B)
F) A) and C)

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Figure 14-5 Suppose a firm operating in a competitive market has the following cost curves: Figure 14-5 Suppose a firm operating in a competitive market has the following cost curves:   -Refer to Figure 14-5. When market price is P7, a profit-maximizing firm's short-run profits can be represented by the area A)  P7 × Q5. B)  P7 × Q3. C)  (P7 - P5)  × Q3. D)  We are unable to determine the firm's profits because the quantity that the firm would produce is not labeled on the graph. -Refer to Figure 14-5. When market price is P7, a profit-maximizing firm's short-run profits can be represented by the area


A) P7 × Q5.
B) P7 × Q3.
C) (P7 - P5) × Q3.
D) We are unable to determine the firm's profits because the quantity that the firm would produce is not labeled on the graph.

E) A) and B)
F) A) and C)

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A firm operating in a perfectly competitive industry will continue to operate in the short run but earn losses if the market price is less than that firm's average variable cost but greater than the firm's average fixed cost.

A) True
B) False

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

A) True
B) False

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Scenario 14-4 Victor is the recipient of $1 million from a lawsuit. Victor decides to use the money to purchase a small business in Florida. His business operates in a perfectly competitive industry. If Victor would have invested the $1 million in a risk-free bond fund, he could have earned $100,000 each year. After he bought the small business, Victor quit his job as a market analyst with Research, Inc., where he used to earn $75,000 per year. -Refer to Scenario 14-4. What is Victor's opportunity costs of operating his new business?


A) $25,000
B) $75,000
C) $100,000
D) $175,000

E) C) and D)
F) B) and D)

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If a competitive firm is selling 900 units of its product at a price of $10 per unit and earning a positive profit, then


A) its total cost is more than $9,000.
B) its marginal revenue is less than $10.
C) its average total cost is less than $10.
D) the firm cannot be a competitive firm because competitive firms cannot earn positive profits.

E) None of the above
F) B) and D)

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Figure 14-2 Suppose a firm operating in a competitive market has the following cost curves: Figure 14-2 Suppose a firm operating in a competitive market has the following cost curves:   -Refer to Figure 14-2. If the market price is Pa, in the short run the firm will earn A)  positive economic profits. B)  negative economic profits but will try to remain open. C)  negative economic profits and will shut down. D)  zero economic profits. -Refer to Figure 14-2. If the market price is Pa, in the short run the firm will earn


A) positive economic profits.
B) negative economic profits but will try to remain open.
C) negative economic profits and will shut down.
D) zero economic profits.

E) B) and C)
F) B) and D)

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Figure 14-4 Suppose a firm operating in a competitive market has the following cost curves: Figure 14-4 Suppose a firm operating in a competitive market has the following cost curves:   -Refer to Figure 14-4. At which price range will the firm continue to operate in the short run but earn negative profits? A)  any price higher than P4 B)  any price higher than P3 but less than P4 C)  any price higher than P2 but less than P3 D)  any price lower than P1 -Refer to Figure 14-4. At which price range will the firm continue to operate in the short run but earn negative profits?


A) any price higher than P4
B) any price higher than P3 but less than P4
C) any price higher than P2 but less than P3
D) any price lower than P1

E) None of the above
F) All of the above

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The competitive firm's short-run supply curve is that portion of the


A) average variable cost curve that lies above marginal cost.
B) average total cost curve that lies above marginal cost.
C) marginal cost curve that lies above average variable cost.
D) marginal cost curve that lies above average total cost.

E) A) and D)
F) B) and D)

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When price is greater than marginal cost for a firm in a competitive market,


A) marginal cost must be falling.
B) the firm must be minimizing its losses.
C) there are opportunities to increase profit by increasing production.
D) the firm should decrease output to maximize profit.

E) A) and B)
F) B) and D)

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Willie's Wading Adventures sells hip waders for fishing and duck hunting in a perfectly competitive market. If hip waders sell for $100 each and average total cost per unit is $95 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 unit will rise.
D) average total costs will fall.

E) All of the above
F) A) and B)

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Describe the difference between average revenue and marginal revenue. Why are both of these revenue measures important to a profit-maximizing firm?

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Average revenue is total revenue divided...

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A profit-maximizing firm in a competitive market will increase production when average revenue exceeds marginal cost.

A) True
B) False

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When economists refer to a production cost that has already been committed and cannot be recovered, they use the term


A) implicit cost.
B) explicit cost.
C) variable cost.
D) sunk cost.

E) C) and D)
F) A) and C)

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If occupational safety laws were changed so that firms no longer had to take expensive steps to meet regulatory requirements, we would expect that


A) the demand for products in this industry would increase.
B) the market price of products in this industry would decrease in the short run but not in the long run.
C) the firms in the industry would make a long-run economic profit.
D) competition would force producers to pass the lower production costs on to consumers in the long run.

E) B) and D)
F) A) and D)

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Suppose the long-run supply curve for a good is upward-sloping. The upward slope could be explained by


A) decreases in production costs resulting from more firms coming into the market.
B) a breakdown of the "free entry and exit" feature of competition.
C) a breakdown of the "price taking" feature of competition.
D) the fact that a resource used in the production of the good is available only in limited quantities.

E) B) and D)
F) A) and B)

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