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PJ-John · 2020年03月11日

问一道题:NO.PZ2018091706000020 为什么答案不是C???

问题如下:

Economic data of a country is showed below:

According to the economic data, which of the three counties most likely rely on the capital deepening?

选项:

A.

Country X.

B.

Country Y.

C.

Country Z.

解释:

A is correct.

考点Cobb-Douglas production function 的变形公式

解析先写出变形公式

Growth rate of labor productivity= Growth rate of TFP+ Growth rate of capital deepening假设劳动力恒定不变

capital deepening%=y/y-T/T

X=2.6-0.8=1.8

Y=1.8-1=0.8

Z=1-(-0.1) =1.1

为什么答案不是C???

我的解题思路跟答案一样,从数值上看,确实是X国的资本深化速度更快,Z国的技术进步为负值,其经济增长完全依赖资本深化,Z的资本深化占经济增长比重更大,再审题,题目中问的是:三个国家中哪一个国家的经济增长更依赖资本深化?应该选C啊

1 个答案

源_品职助教 · 2020年03月11日

这是原版书的改编题,原本书的思路就是比较绝对数值而不是看比重

所以考试碰到类似题目我们建议同学就按照原版书的思路来就好,拿分最重要

至于为什么不看比重,我们考虑到,如果是比重,那么有的部分由正变负或者由负变正,这种情况就很难处理。所以看绝对数字就好。

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