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 is most likely to have caused the shift from $AD_1$to $AD_2$ in the diagram above
I. Expectations of future decrease in the average price level
II.Decrease in interest rates
III. Increase in income taxes
IV.Increase in income of trading partners
A. I only
B. II only
C. II and III only
D. II and IV only
参考答案: D
本题详细解析:
The aggregate demand shifts rig(9 xdkk eky/g4htward ($AD_1$to $AD_2$) when a component of AD increases. The components of AD are consumption (C), investment (I), government spending (G), and net exports (NX), which are calculated as exports (X) minus (M).
Choice I is incorrect because a future decrease in price levels will incentivise people to reduce consumption.
Choice II is correct because a reduction in interest rates boosts consumption and investment.
Choice III is incorrect because an increase in income taxes reduces disposable income and leads to a fall in consumption.
Choice IV is correct because an increase in income of trading partners increases a country's exports, increasing net exports.
| 
