S-notes economics, page141, 2 For a demand-pull effect or a cost-push effect to cause inflation: A. the AS curve has to shift in response to a shift of the AD curve B. the AS curve has to shift in response to a shift of the AS curve C. the cause of the shift in AS or AD must be repeated or sustained. D.economic equilibrium must be re-established at a higher price level 答案是C 解释: To cause more than a one-time increase in the price level, whatever caused the AS curve to shift to the right (demand-pull) or the AS curve to shift to the left (cost-push) must be sustained over time. 我有两个问题: 1.为什么D不对? 对于成本推动和需求拉动型通涨来说,最后的结果不都是经济平衡时的价格水平更高了吗? 2.C是什么意思?对于成本推动型通涨而言,SRAS的下降会引起产出下降,但经济不会自动回升(因为工资粘性),所以需要相应的货币财政政策,但是对于需求拉动型通涨而言,不是会自动恢复经济平衡的吗?怎么说要一定要repeated或者sustained? | 
发表于 2007-8-29 23:14
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