作者Los3r ( )
看板Grad-ProbAsk
标题Re: [问题] 中央产经
时间Wed Mar 18 23:04:37 2009
※ 引述《stephanie012 (隐函数)》之铭言：
: 有几题选择题想讨教:
: 1. The demand curve for a unique product without substitutes is
: a. upward sloping
: b. downward sloping
: c. vertical
: d. horizontal
: 我选c 参考解答是b
P
│ ╲ downward sloping
│ ╲ 商品越贵你越不想买它
│ ╲ 价钱便宜你会多卖，价钱贵则少买
│ ╲ Demand 符合一般情形
│ ╲
└───────Q
P
│ │
│ │ vertical
│ │ 你不计任何代价要买到特定的商品量
│ │
│ │Demand
└───┴───Q
: 2. "Given the long run implication of Solow's growth model with respect to
: the rate of savings, the low savings rate in Taiwan is not a problem."
: This statement overlooks that over time it appears that
: a. total factor productivity(TFP) and the growth rate of capital per person
: are inversely related.
: b. TFP and the growth rate of capital per person are positively related.
: c. TFP and the difference between the growth rates of capital per capita and
: population are not related.
: d. saving rates and per capita growth rates are inversely related.
: e. saving rates and per capita growth rates are not related.
: 这题在考古题出现好多次
: 但参考解答的答案皆不同
: 我找到的答案是c
: 有人可以解释一下这题到底想问什麽吗?
: 烦请各位高手解答 谢谢!
Ｙ＝Ａ*Ｋ^(1-α)*Ｌ^(α)
Ａ:total factor productivity(TFP)，负责解释投入(K、L)之外的因素
所以A和K及L无关，所以和capital per person既不是inversely related
也不是positively related
c:就是无关啊，正确
资本成长=(saving rate * Total Putput)-(depreciation rate*Total Capital)
新投入的资本 资本的折旧
saving rate越高，资本成长越多，capital growth rate 越高
所以是postively related，不是inversely related或not related
--
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◆ From: 140.112.4.110
1F：推 stephanie012:谢谢! 所以第一题的意思是商品仍符合需求法则故 03/19 00:01
2F：→ stephanie012:需求曲线仍为负斜率吗? 那题目中提到"没有替代品"呢? 03/19 00:02
3F：→ Los3r:"没有替代品":唬人的 03/19 00:20
4F：→ Los3r:就算全部能买的商品只有一种，消费者能会再它贵的时候少买 03/19 00:21
5F：→ Los3r:如果明天世界上只有猪肉可以吃，你也不会不计代价狂买猪肉 03/19 00:24
6F：→ Los3r:因为明天的猪肉可以跟後天以及更未来的猪肉替代 03/19 00:24
7F：→ Los3r:如果之後可以用比明天低的价钱买，正常人会选择之後多买 03/19 00:26
8F：→ Los3r:如果某天猪肉比较贵，就那天少吃，其他天多吃一点 03/19 00:28
9F：推 stephanie012:谢谢你! 03/19 22:32