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黄路迦 · 2021年11月29日

我的思路是,题目问rely on capital deepening,会直接想到因为developing国家和developed国家,又因为ΔY/Y=Δy/y+ΔL/L,而ΔY/Y代表了potential GDP的增速,developing国家的potential GDP增速要大于developed国家的potential GDP的增速,所以只要看哪个国家Δy/y+ΔL/L最大,就说明它就是developing国家,也就是最rely on capital deepening,这样的思路难道不对吗?求解

NO.PZ2018091706000020

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

我的思路是,题目问rely on capital deepening,会直接想到因为developing国家和developed国家,又因为ΔY/Y=Δy/y+ΔL/L,而ΔY/Y代表了potential GDP的增速,developing国家的potential GDP增速要大于developed国家的potential GDP的增速,所以只要看哪个国家Δy/y+ΔL/L最大,就说明它就是developing国家,也就是最rely on capital deepening,这样的思路难道不对吗?求解

1 个答案

笛子_品职助教 · 2021年11月30日

嗨,努力学习的PZer你好:


我的思路是,题目问rely on capital deepening,会直接想到因为developing国家和developed国家,又因为ΔY/Y=Δy/y+ΔL/L,而ΔY/Y代表了potential GDP的增速,developing国家的potential GDP增速要大于developed国家的potential GDP的增速,所以只要看哪个国家Δy/y+ΔL/L最大,就说明它就是developing国家,也就是最rely on capital deepening,这样的思路难道不对吗?求解


这样的思路完全正确。你提供了第2种解法。用这个思路来解答一下,最终答案是一样的。


潜在增长率 = 劳动生产率 + 劳动力


X的潜在增长率 = 2.6+2.1=4.7

Y的潜在增长率 = 1.8+1.5=3.3

Z的潜在增长率 = 1+0.6=1.6


X国家的潜在增长率最大,X是发展中国家。发展中国家最依赖资本深化。选A。



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