Econ 4831: Cost and Benefit Analysis

（a）（10分）使用时间常数折扣计算这些福利的现值

（b）（15分）使用以下时间递减法计算这些福利的现值

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

1 + 5％
（而不是P V（X）=​​ X·e
−5％）

（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

(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.