A concentration ratio is the ratio of
a. market share to the number of firms in an industry
b. total sales to the number of firms in an industry
c. large firms to small firms in an industry
d. total sales of the leading firms to total sales in the industry
e. total profits of the leading firms to total profits in the industry
D
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Shama is producing candles in a perfectly competitive market. When she produces 500 candles, her total cost is $250. If she produces one additional candle, her total cost increases to $260
In order to maximize her profit, she should produce the additional candle A) if the market price for a candle is $12. B) only if the market price exceeds $260 for a candle. C) only if the market price exceeds $250 for a candle. D) if the market price for a candle exceeds $0.50. E) if her price exceeds her average total cost.
A market demand curve measures
A) how much a consumer is willing to pay for an additional unit of the good. B) the marginal social benefit of an additional unit of the good. C) the marginal social cost of an additional unit of the good. D) Both answers A and B are correct.
Using the simple Keynesian model with a consumption function of C = 200 + .9Y, an $10 change in desired investment leads to a change in equilibrium income of
A) $10. B) $100. C) $20. D) $90.
Suppose that one-year Treasury bills yield 6 percent in the United States and 4 percent in Britain. Investors will be indifferent between them if they expect the dollar to
A) depreciate against the pound by approximately 2 percent. B) appreciate against the pound by approximately 2 percent. C) depreciate against the pound by approximately 33 percent. D) appreciate against the pound by approximately 33 percent.