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 following changes will lead to9v9*s rq kfox, both an inczriuu) sac - u(6s:kp+rease in AD in the short-run and an increase in LRAS ck au+ u:uipz )(rss-6in 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 so encourage invest7bltq3s2el5 h sun5ct3ld 2d- xh00d*) tjjhkment expenditure: aggregate d3dtb )jle552lsjsdkth 37u20nhx c 0t-l*d hq emand (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.
| 
