本题目来源于试卷: IB Economics Unit 3.1: Macroeconomics - Economic Output, AD & AS，类别为 IB经济学
[单选题]
Identify which of the folllk 0gjzz9x6v/ r yl)/ov6r,weloe) t u.l5bf4owing changes will lead to both an increase in AD in the short /l5,fe ouw4rbyv )o le.6r)tl-run and an increase in LRAS in the long-run.
A. Rise in consumer confidence
B. Fall in interest rates
C. Rise in income of trading partners
D. Depreciation of the country’s currency
参考答案: B
本题详细解析:
A fall in interest rates wil w+v hi15ziup8l make borrowing cheaper, and so encourage investment expenditure: aggregate uhz+i w58pv1idemand (AD) will increase in the short-run.
Moreover, investment is the spending on the creation or replacement of capital, so in the long run, the quantity of capital will increase, leading to an increase in long-run aggregate supply (LRAS).
Choices A, C, and D will lead to an increase in AD in the short run, but are unlikely to cause an increase in LRAS in the long run.
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