请问怎么区分bottom-up？

问题如下：

Steve is considering investing PZ Inc. and he asks three of his analysts to forecast the 2018 income statement for PZ. Based on the summary of the analysts’ key assumptions, who is most likely using a bottom-up approach to model net sales?

选项：

A.

Peter.

B.

Anderson

C.

Phil.

解释：

A is correct.

考点：Approaches for Equity Valuation Models

解析：A是正确的。bottom-up approach从公司层面的数据开始估计。Peter通过使用公司年平均增长率对PZ销售进行估计，因此它使用的是自下而上的方法。Anderson和Phil都是从整体经济的层面开始估计，这是自上而下的方法。