这个作业是计算项目投资回报以及利率分析
Econ 4831: Cost and Benefit Analysis
练习1：长期折扣（30分）
假设一个项目将在150年内（即每年）带来100万美元的收益
好处），修建一座水电大坝，为城市提供清洁能源。
（a）（10分）使用时间常数折扣计算这些福利的现值
速率为3。
（b）（15分）使用以下时间递减法计算这些福利的现值
贴现率计划：1–50年为3.5％；多年来为2.5％（51-100）； 1％
101-150年。
（c）（5分）您在（a）中的答案与（b）有什么比较？差异是否显着
足够重要？
注意：在此练习中，请使用离散的时间利率（而不是连续的时间利率）
利率），即以5％的利率折让“ X”一年，我们将使用P V（X）= X
1 + 5％
（而不是P V（X）= X·e
−5％）
练习2：选择利率（30分）
对于以下练习，请阅读文章Moore，Mark A.等。 ”“给我一个
数！”社会折现率的实用价值。”政策分析与杂志
管理23.4（2004）：789-812。
文件：也在画布中。
（a）（15分）阅读文章，尤其是“估算消费利率（CRI）”小节，以要点形式总结建议作为代理的内容
CRI以及选择它的主要原因。之后，评论
您是否认为这是CRI的合适代理，还是有更好的选择。
(b) (15 pts) Read the article and in particular the sub-section “Estimating the Shadow
Price of Capital (SPC) for the CRI-SPC Method”, summarize in bullet points form what’s
proposed as a proxy for the SPC and the main reasons it was chosen over the alternatives.
After that, comment on whether you think that’s an appropriate proxy for the SPC or if
there is a better alternative.
Exercise 3: Meta-analysis (40 points)
Refining raw gold ore to remove impurities and concentrate gold content usually involves
caustic chemicals. One method involves dissolving the gold with a concentrated cyanide
solution. The concentrations of cyanide used in this process are extremely dangerous, and
if spilled into the environment, pose a significant threat to wildlife and human health.
A city has hire you to write a CBA for a Gold mine and processing facility bound to be
to installed between the county limits. They promise to keep any cyanide solution in safe
storage and dispose of it without any risk to the local population. Nevertheless, the city
council wishes for you to analyze the possible impact of a spillover of the pollutant.
You have gather all the relevant information that would allow you to carry out your
analysis except for one, the shadow price for a kilogram of spilled cyanide solution. You
don’t have a proper budget to calculate this variable, luckily your research team has found
four other analysis that computed the cyanide’s shadow price.