[单项选择]Equilibrium in a perfectly competitive market results in a quantity for which the:（）
A. difference between consumer and producer surpluses is maximized.
B. consumer and producer surpluses are equal.
C. sum of consumer and producer surpluses is maximized.

[单项选择]In a perfectly efficient market, portfolio managers should do all of the following EXCEPT:（）
A. rebalance their portfolio when changes are necessary.
B. diversify to eliminate systematic risk.
C. quantify their risk and return needs within the bounds of the client’s liquidity, income, time horizon, legal, and regulatory constraints.

[单项选择]Compared to a competitive market, a monopoly situation will produce:（）
A. less output, and the sum of the consumer surplus and the producer surplus will be reduced.
B. more output, and the sum of the consumer surplus and the producer surplus will be reduced.
C. less output, and the sum of the consumer surplus and the producer surplus will be increased.

[单项选择]In a competitive market, the gains to society are maximized under which of the conditions described below Marginal Benefit Marginal Cost Producer Surplus Consumer Surplus（） ①A. $1.25 $1.00 $25 $25 ②B. $1.50 $1.50 $45 $30 ③C. $2.50 $2.50 $35 $35
A. ①
B. ②
C. ③

[填空题]In a purely competitive market, the supplier of goods and services has no control over the market price, because he produces too little to (26) market conditions. With no difference between his products and the products of his competitors, he will sell nothing if he charges above the market price and he will sell all if he charges at or below the market price. However, in thinking over the price, he must take the cost of production into (27) and no business person can (28) to lose money for a (29) period. He must be constantly aware of his costs in (30) to the market price if he is to competes (31) and earn a profit. Many people have the (32) that as production increases, costs per unit decrease. While mass production has made this true in certain (33) and at certain levels of production, both logic and practical experiences have shown that costs per unit begin to rise beyond a certain level of prod

[单项选择]In perfectly competitive constant-cost industries and perfectly competitive increasing-cost industries, respectively, what is the most likely long-run effect of a permanent increase in demand ncreasing-cost industry Constant-cost industry（）①A. price decreases price decreases ②B. price decreases price remains unchanged ③C. price remains unchanged price decreases
A. ①
B. ②
C. ③

[单项选择]Firms in perfectly competitive markets and firms operating in a market characterized by monopolistic competition have several things in common. Which of the following is least likely one of them（）
A. Both maximize economic profit.
B. Both face perfectly elastic demand curves.
C. Both operate in markets that have low or no barriers to entry.

[单项选择]In a perfectly competitive industry, the short-run supply curve for the market is the:（）
A. marginal cost curve above the average variable cost curve.
B. sum of the individual supply curves for all firms in the industry.
C. average variable cost curve above the marginal cost curve.

[填空题]One of the competitive strategies in the market is______(要最大限度地开发潜在客户)．

[单项选择]

In a perfectly free and open market economy, the type of employer -- government or private -- should have little or no impact on the earnings differentials between women and men. However, if there is discrimination against one sex, it is unlikely that the degree of discrimination by government and private employers will be the same. Differences in the degree of discrimination would result in earnings differentials associated with the type of employer. Given the nature of government and private employers, it seems most likely that discrimination by private employers would be greater. Thus, one would expect that, if women are being discriminated against, government employment would have a positive effect on women’s earnings as compared with their earnings from private employment. The results of a study by Fuchs support this assumption. Fuchs’s results suggest that the earnings of women in an industry composed entirely of government employees would be 14. 6 percent great
A. Brown’s elaboration of his research results
B. Brown’s tentative inferences from his data
C. Brown’s conclusions based on common-sense reasoning
D. the author’s conclusion, based on Fuchs’s and Brown’s results