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买买要当学霸 · 2019年12月29日

问一道题:NO.PZ2015120204000056

问题如下:

Alicia Maxwell, an analyst for a REIT, is evaluating the potential purchase of a hotel property. She plans to use simulation analysis to estimate the distribution of the property’s annual operating cash flow for the next five years.

Expense Assumptions
Maxwell examines current expenses for the REIT’s other hotel properties and selects the distributions for the simulation of operating expenses and management fees. Maxwell estimates operating expenses to be uniformly distributed between 68% and 70% of revenues and that the property management fee for the hotel is uniformly distributed between 5.9% and 6.1% of total annual revenue.

Maxwell’s distribution assumption for the property management fee in the simulation is based on:

选项:

A.

historical data.

B.

simulation results.

C.

cross-sectional data.

解释:

C is correct. Maxwell uses the distribution of property management fees for the REIT’s other hotel properties to simulate the property management fee. Therefore, the property management fee distribution is based on differences in property management fees across a cross-section of the REIT’s existing hotel properties that are similar to the hotel being analyzed.

A is incorrect because Maxwell’s distribution assumption about the property management fee is not based on historical data for the hotel. The property is new, and therefore Maxwell does not have a history of reliable data for the property management fee to use.

B is incorrect because the property management fee distributional assumption is not based on the results of a simulation but rather is based on cross-sectional data. The property management fee is based on the property management fees for the REIT’s other hotel properties. Once the distributional assumption is made (that is, the statistical distribution and parameters), Maxwell may then incorporate these into the trials for the management fee.
 

答案没看明白 老师能解答一下吗

2 个答案

星星_品职助教 · 2020年05月27日

@Bluebiubiu

simulation的顺序是先假设一个input的分布,然后做simulation,然后得出结果。这道题问假设input服从的分布是基于什么得到的,不能是基于simulation的结果得到的,因为这是输入变量,这个时候simulation还没做。

这个题目基础班上课有讲解,课后题班也有,可以听一下。

星星_品职助教 · 2019年12月30日

同学你好,
这道题想考察的知识点是如果想要去做一个simulation,首先需要有输入要素(input),而这个“input”是一个分布。题目问的是这个input服从的分布是基于什么得出的。

由于Maxwell是通过检查“other hotel properties”的current expense从而才得到了分布。这就是一个横截面数据(cross-setional),横截面数据可以理解为在同一时间点,各个不同hotel properties的数据。所以选择C。

如果题干描述的是同一个hotel property,不同时间的数据(如历年数据),则就需要选择历史数据或者时间序列数据。所以不选择A。
而B的顺序说的不对,应该是先有input的分布,然后才做simulation,进而得出results(也是一个分布)

Bluebiubiu · 2020年05月27日

B的顺序的解释没用理解,麻烦您再仔细讲一下

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