經濟學-跨期消費選擇理論 - 經濟

※ [本文轉錄自 Grad-ProbAsk 看板]

作者: HamBearJ (C'EST CA QUE) 看板: Grad-ProbAsk
標題: [問題] 經濟學-跨期消費選擇理論
時間: Wed Dec 24 12:00:10 2008

問題:(政大企研94)

Suppose an individual has a fixed amount of wealth to allocate between
cunsumption in two periods (C1 and C2). Any funds not spent in peroid 1
will earn interest (at the rate r), which will increase purchasing power
in period 2. Consider four possible reactions to an increase in r.

I. C1 increases.
II. C1 decreases.
III. C2 increases.
IV. C2 decreases.

Which of these is consistent with the hypothesis that both C1 and C2 are
normal goods?

(A) I, II, III, and IV.
(B) I, II, and IV, but not III.
(C) I, III, and IV, but not II.
(D) II and III, but not I and IV.
(E) I, II, and III, but not IV.


答案:(D)

[題庫書上的分析]
此為RBC模型. RBC模型為總體新興古典學派的一分支, 其特別強調跨期之間的替代
效果影響, 通常本期利率提高後, 會導致民眾以減少本期部分消費來提高增加未來
消費, 且會以增加本期勞動供給來替代(減少)未來的勞動供給.

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我的問題是, 不是有一些情況嗎?

1. 利率上升對於lender來說等同於實質所得上升, 依據所得效果和替代效果可以確定
C2必上升, 但C1不一定.

2. 利率上升對於borrower來說等同於實質所得下降, 依據所得效果和替代效果可以確定
C1必減少, 但C2不一定.

要怎麼判斷答案呢???


請大家忙看一下!
謝謝!!



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