算d/e ratio要考虑税盾吗？
问题如下图：
选项：
A. 
B. 
C. 
解释：
NO.PZ2016021705000036 问题如下 analyst gatherethe following information about a private company anits publicly tracompetitor:Using the pure-plmetho the estimateequity beta for the private company is closest to: A.1.029. B.1.104. C.1.877. is correct.Inferring the asset beta for the public company: unleverebeta = 1.75/[1 + (1 − 0.35) (0.90)] = 1.104. Relevering to reflethe target ratio of the private firm: leverebeta = 1.104 × [1 + (1 − 0.30) (1.00)] = 1.877. 为什么先算一遍去杠杆的β，再算一遍加杠杆的β，遇到这种算nonpublic company的β都这么算吗？
NO.PZ2016021705000036 问题如下 analyst gatherethe following information about a private company anits publicly tracompetitor:Using the pure-plmetho the estimateequity beta for the private company is closest to: A.1.029. B.1.104. C.1.877. is correct.Inferring the asset beta for the public company: unleverebeta = 1.75/[1 + (1 − 0.35) (0.90)] = 1.104. Relevering to reflethe target ratio of the private firm: leverebeta = 1.104 × [1 + (1 − 0.30) (1.00)] = 1.877. 请问如题bt/equity=0.9的话 意思就是bt是0.9 equity是1吧？
NO.PZ2016021705000036 问题如下 analyst gatherethe following information about a private company anits publicly tracompetitor:Using the pure-plmetho the estimateequity beta for the private company is closest to: A.1.029. B.1.104. C.1.877. is correct.Inferring the asset beta for the public company: unleverebeta = 1.75/[1 + (1 − 0.35) (0.90)] = 1.104. Relevering to reflethe target ratio of the private firm: leverebeta = 1.104 × [1 + (1 − 0.30) (1.00)] = 1.877. 关于asset beta、equity beta，以及pure-plmetho有了解到，在哪里可以补习一下这个内容啊？
NO.PZ2016021705000036 1.104. 1.877. is correct. Inferring the asset beta for the public company: unleverebeta = 1.75/[1 + (1 − 0.35) (0.90)] = 1.104. Relevering to reflethe target ratio of the private firm: leverebeta = 1.104 × [1 + (1 − 0.30) (1.00)] = 1.877.请问用截图中的这个公式怎么求解
请教老师，为什么计算pure-plmetho候，W asset*贝塔asset=W equity*贝塔equity里的两个权重都考虑了bt的税盾，但算WACC时，每一项的权重系数W里不需要考虑bt的税盾？
