2019年CFA考试《CFA一级》考试共240题，分为单选题。小编为您整理Economics5道练习题，附答案解析，供您备考练习。

1、The following data apply to a country in its domestic currency units:Using the expenditures approach, the country’s gross domestic product (GDP) is closest to:【单选题】

A.1,448,650.

B.1,451,500.

C.1,466,490.

正确答案:A

答案解析:“Aggregate Output, Prices, and Economic Growth,” Paul R. Kutasovic, CFA and Richard G. Fritz[1662201704061-image/0394.jpg]

2、Three firms operate under perfect competition, producing 900 units of the same product but using different production technologies. Each company’s cost structure is indicated below:Which of the following statements is most accurate? If the unit selling price is:【单选题】

A.$6.00, all firms should exit the market in the long run.

B.$3.50, firm X should continue to operate in the short run, but firms Y and Z should shut down production.

C.$4.50, all firms should continue to operate in the short run, but exit the market in the long run if these conditions are expected to persist.

正确答案:B

答案解析:“Demand and Supply Analysis: The Firm,” Gary L. Arbogast, CFA and Richard V. Eastin[1662201704061-image/0495.jpg]

3、The most likely initial (short-run) effect of demand-pull inflation is an increase in:【单选题】

A.employee wages.

B.finished good prices.

C.commodity prices.

正确答案:C

答案解析:The effect of demand-pull inflation is an increase in the aggregate demand, which, in turn, leads to an increase (initially) in commodity prices.Sections 4.2.4–4.2.4.2

4、The price of a good falls from $15 to $13. Given this decline in price, the quantity demanded of thegood rises from 100 units to 120 units. The arc price elasticity of demand for the good is closest to:【单选题】

A.1.3.

B.1.5.

C.10.0.

正确答案:A

答案解析:Arc price elasticity of demand is calculated as: %ΔQ/%ΔP=([1662201704111-image/421.jpg]) / ([1662201704111-image/422.jpg]).In this case, (20/110)/(2/14)=1.27 rounded to 1.3.Section 4.1

5、Which of the following obstacles to efficiency least likely leads to overproduction?【单选题】

A.External costs.

B.External benefit.

C.Common resource.

正确答案:B

答案解析:外部成本是指企业在生产决策中没有考虑到的对于社会的额外成本，比如环境污染等，应该减少产量，此时企业产量超过了最优生产量，造成了过度生产。外部收益是指企业在生产决策中没有考虑到的对于社会的额外收益，比如净化空气等，应该增加产量，此时企业产量低于了最优生产量，造成了过少生产。公共资源由于没有规范产权，所有人都可以使用，也会造成过度生产。