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 th0ji9)o 5,qbwri .vi wbe following changes g2j8 es fwt5yz-2-a kvwill lead to both an increase in AD in the short-run and an increase in Lfgey-52 s- wz8katj v2RAS 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 will make borrowing cheaper, and sbw:7p ) qdbwg;o encourage investment expenditure: aggregate demand (AD) will increase in the short-run.
b pw7:g)qwb ;d
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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