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77 · 2021年02月22日

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NO.PZ2018062003000089

问题如下:

Last year, the annual value of final goods and services of country. A increased from $200 billion to $400 billion, the GDP deflator increased from 120 to 170. In this condition, the real GDP of country A increased by:

选项:

A.

35%.

B.

41%.

C.

52%.

解释:

B is correct.

Real GDP in the year before last was: $200/1.2= $167

Real GDP in the last year was: $400/1.7= $235

($235- $167)/$167=41%

考点: GDP deflator

解析:运用 GDP deflator 反解出一年前后的真实GDP数值,

一年前:$200/1.2= $167

一年后:$400/1.7= $235

在进一步求得真实GDP的增长率,($235- $167)/$167=41%

这个题完全二丈和尚摸不到头脑,200和400不是指A价格的增长么?(如果知道是nominalGDP的话就知道用deflator的公式了。。。)怎么就成了nominalGDP了??GDP到底是数字还是百分数呢?如果是数字的话,为啥最后realGDP是百分数呢?为何差异会如此之大,还有..deflator怎么就能想到要除以100呢。。好崩溃

1 个答案

丹丹_品职答疑助手 · 2021年02月22日

嗨,努力学习的PZer你好:


同学你好,从200到400求的是nominal 口径进行的计算,而题干问的是real gdp的增长。所以我们要先求出来real gdp再计算其增长率。这是从问题的角度我们确认要先去计算real gdp

之所以乘以100是因为gdp deflator的计算公式=(value of current year at current year prices)/(value of current year output at base year prices) *100

本身在公式里面就乘以100,所以计算的时候是要除掉的

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就算太阳没有迎着我们而来,我们正在朝着它而去,加油!

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NO.PZ2018062003000089 问题如下 Last year, the annuvalue of fingoo anservices of country. A increasefrom $200 billion to $400 billion, the G flator increasefrom 120 to 170. In this contion, the reG of country A increaseby: A.35%. B.41%. C.52%. B is correct.ReG in the yebefore last was: $200/1.2= $167ReG in the last yewas: $400/1.7= $235($235- $167)/$167=41%考点 G flator解析运用 G flator 反解出一年前后的真实G数值,一年前$200/1.2= $167一年后$400/1.7= $235在进一步求得真实G的增长率,($235- $167)/$167=41% 这个公式不是名义G/reGx100吗。为什么不能用增长的名义G/增长的reG 在乘以100=增长的50这个式子把reG反求出来增长了多少?

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