解释答案里可不可以写一个正确选项 有时候解释看不太明白的时候 还要去猜到底哪个是正确答案 所以应该是选b吗这道题
问题如下图:
选项:
A.
B.
C.
D.
解释:
It stays constant over time. It generally tracks nominrates over time. It is volatile over time, similto both reannominrate. It shoulpointeout thwhile it is true ththe regression hee assumes a constant betthis is not a realistic assumption; thus, it is best to estimate beta over severtime perio ancompare accorngly. 讲义里好像没有提到β是恒定不变的?(如果有,麻烦老师告知在哪个地方)这是结论么?
这道题目是考的哪个知识点?
不变的话如何provi estimate of the volatility of hee ratio?是不是一段时间不变而已?
C为什么不对?