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]
An increase in aggregate demand from AD to $AD_1$ does not change the average price level (PL) because
A. there is spare capacity
B. the economy is operating at low levels of national income
C. the government budget deficit increases
D. the level of consumer debt is high
参考答案: A
本题详细解析:
Spare capacity refers to the existence of unused re+wkjxmo.wy. r3e1(+jxd -j e yn3l.zvsources, including unemployed labour and underutilised capital. These resources can be effectively utilised when aggregate demand (AD) incree(1jy-r wx.v ndk3ow ej.z++ xjy3l.mases, without causing a rise in production costs and consequently maintaining a stable price level.
These options are incorrect because:
(Option B) The economy's low levels of national income are not the cause of the average price levels (APL) not rising.
(Option C) Increasing AD will lead to higher tax revenues, resulting in reduced budget deficits. This is the effect on the government budget, not the cause.
(Option D) An increase in AD may lead to high consumer debt, but this is the effect of the increase in AD on consumer debt, not on APLs.
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