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黄路迦 · 2022年11月25日

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NO.PZ201512020800000402

问题如下:

2. Based upon Exhibit 1, capital deepening as a source of growth was most important for:

选项:

A.

Country A.

B.

Country B.

C.

Country C.

解释:

A is correct.

The associate economist can measure the effect of pure capital deepening by measuring the difference of the growth rates of labor productivity and total factor productivity (TFP). The larger the difference, the more important capital deepening is as a source of economic growth. From 2000–2010, Country A’s labor productivity grew by 2.4% per year, of which 0.6% came from TFP growth and 1.8% from capital deepening (2.4% – 0.6% = 1.8%).

考点Cobb-Douglas production function 的变形公式

解析先写出变形公式

一国人均产出也就是劳动效率的增加来自于两个方面:资本深化以及技术的进步

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

最后计算结果是A国的数值最高(2.4% – 0.6% = 1.8%).这就表明A国对于资本深化最依赖,资本深化对于该国经济增长的贡献最大。

根据y=Tk^a,可以得知△y/y=△T/T+a△K/k,这个式子应该是对的吧,那为什么题目中没有给出a,而答案可以直接令a=1呢?

1 个答案

笛子_品职助教 · 2022年11月26日

嗨,从没放弃的小努力你好:


根据y=Tk^a,可以得知△y/y=△T/T+a△K/k,这个式子应该是对的吧,那为什么题目中没有给出a,而答案可以直接令a=1呢?


是的,同学理解正确,这里是有一个系数的。

但是这道题并没有让计算出准确的数值,它只是比一个大小。


题目问的是capital deepening,哪个国家最多。

所以为了计算方便,我们假设了a=1。

同学也可以假设a=2,虽然数字不同,但是也能得到同样的结论,依然是A的capital deepening最多。

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