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郑毅Justin · 2020年12月23日

问一道题：NO.PZ2018091706000020 [ CFA II ]

  1. CFA II
  2. Economics Analysis

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

​​老师好，这题假设劳动力恒定不变不是很懂。以x国为例子，资本深化的变化率不就等于2.6-0.8-2.1么？为啥假定劳动力恒定不变就要把劳动力变化率这个因素在计算中剔除呢？

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1 个答案

丹丹_品职答疑助手 · 2020年12月24日

嗨，爱思考的PZer你好：


同学你好，本题考查的是柯布道格拉斯公式的变形公式，这里面y=Y/L，所以只有假定各个国家的workers数量恒定不变才能考查资本深化或者技术变革的变化情况。可参见讲义104-106页


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