Jackie 發問時間: 教育與參考考試 · 8 年前

(急)求救!!尋找經濟學高手解答~謝謝

1.If a perfectly competitiveindustry is in short-run equilibrium, (A)it must also be in long-run equilibrium.(B)it won’t bein long-run equilibrium.(C)it may or may not be in long-run equilibrium.(D)long-run andshort-run equilibrium are completely independent of each other.2.If a perfectly competitiveindustry is in long-run equilibrium, (A)it must also be in short-run equilibrium.(B)it won’t bein short-run equilibrium.(C)it may or may not be in short-run equilibrium.(D)long-run andshort-run equilibrium are completely independent of each other.3.The short-run supply curve fora firm under perfect competition is the portion of the firm’s marginal costcurve that is above the (A)average cost curve.(B)average fixed cost curve.(C)average variable cost curve.(D)minimum of the marginal cost curve.4.A perfectly competitive firmcan (A)alwaysincrease profit by increase output.(B)never earn a positive economic profit.(C)always increase revenue by increasingout-put.(D)always increase revenue by raising its price. 5.For a price taker in theproduct market, (A)price, average revenue, and marginal revenue are identical.(B)price isgreater than average revenue and equal to marginal revenue.(C)price isequal to average revenue and greater than marginal revenue.(D)there is norelationship between price and marginal revenue.6.Given the supply of a commodityin the market period , the price of the commodity is determined by (A)the marketdemand curve alone. (B)the market supply curve alone.(C)the market demand curve and the market supply curve.(D)none of theabove.7.Marginal profit equals thedifference between (A)total revenue and total cost.(B)average revenue and average cost.(C)marginal revenue and marginal cost.(D)the demandcurve and the marginal cost curve.

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  • 小齊
    Lv 6
    8 年前
    最佳解答

    1.If a perfectly competitive industry is in short-run equilibrium,(C)it may or may not be in long-run equilibrium.

    Suppose the profit is normal profit (P=0), it is both in short-run and long equilibrium. While the profit is greater or less than normal profit, it is in short-run but not in long-run.

    2.If a perfectly competitiveindustry is in long-run equilibrium, (A)it must also be in short-run equilibrium.

    3.The short-run supply curve fora firm under perfect competition is the portion of the firm’s marginal costcurve that is above the C)average variable cost curve

    4.A perfectly competitive firm can

    (B)never earn a positive economic profit.

    5.For a price taker in the product market,

    (A)price, average revenue, and marginal revenue are identical.

    6.Given the supply of a commodity in the market period , the price of the commodity is determined by

    (C)the market demand curve and the market supply curve

    7.Marginal profit equals the difference between

    (C)marginal revenue and marginal cost

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