本题目来源于试卷: IB Economics Unit 2.5: Microeconomics - Market Failure，类别为 IB经济学
[单选题]
Governments invest in the construction and maintenance of p gim:lt. oc(*zv9 m;binfrastructure such asit9lob;c vm* (z pg:.m30r p(g xzne mbnr76ug;0z-9na od5r l roads, bridges, and public transportation systems. These projects improve mobility and facilitate economic activities for the entire population. For instance, the interstate highway system in the United States connects people across states and enables the efficient movement of goods and servicd r3;09np0mlg5 oxeuar7r- 6bn zzng (es.
Based on the scenario above, which of the following statements are true?
I. Infrastructure such as roads, bridges and public transportation systems generate positive production externalities.
II. Government investment in infrastructure projects is an example of direct provision by the public sector.
III. In the absence of government intervention, infrastructure projects are likely to be over provided by the free market.
A. I only
B. II only
C. I and II only
D. I and III only
参考答案: C
本题详细解析:
C Statement I is correct: infrastructure projects generate positive externalities of production because they lower production costs for businesses and make communication and transport more efficient. Statement II is correct: government investment in infrastructure projects is an example of direct provision designed to correct the underprovision of infrastructure by the free market. Statement III is incorrect: infrastructure projects are likely to be under-provided by the free market because of the positive externalities they generate.
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