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我叫仙人涨 · 2019年12月23日

问一道题:NO.PZ201710020100000207 算哪个政策影响最大不是用减法么?

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问题如下:

7 Based on Exhibit 1, which government policy has been most effective in helping Genovia achieve its second initiative?

选项:

A.

Tax on fossil fuels

B.

Subsidy on hydropower

C.

Subsidy on other renewables

解释:



C is correct. At the end of Year 2, the compound annual growth rate (CAGR) for each sector is calculated as follows: (Year 2/Year 0)0.5 – 1

Fossil fuels = (426/462)0.5 – 1 = –4% Hydropower = (273/186)0.5 – 1 = 21% Other renewables = (154/97)0.5 – 1 = 26%.

The CAGR indicates that the 26% increase in production from the subsidy on other renewables has been more effective than the 4% decrease in production from the tax on fossil fuels or the 21% increase in production from the subsidy on hydropower. Thus, the subsidy on other renewables of 26% is the highest, indicating that this policy has been the most effective in helping Genovia achieve its second initiative.

考点:Regulatory Tools

解析:首先我们根据表格计算一下政府实施政策后,不同发电来源产电的变化。

Fossil fuels = (426/462)0.5– 1 = –4%

Hydropower = (273/186)0.5– 1 = 21%

Other renewables = (154/97)0.5 – 1 = 26%.

从计算结果看,石化燃料发电降低了4%,风力发电增加了21%,其他再生资源发电增加了26%。因此从环保节能的角度而言,其他再生资源收获的效果最大。



算哪个政策影响最大不是用减法么?

答案是用占比率,不是比较绝对值么

1 个答案

源_品职助教 · 2019年12月24日

嗨,爱思考的PZer你好:


原版书给出的思路就是算占比率。所以考试的时候按照原版书的方法算就可以了

绝对值没有考虑到初始规模的影响,所以不是非常的贴切。


-------------------------------
虽然现在很辛苦,但努力过的感觉真的很好,加油!


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