
这道题,问
Using the data provided in Exhibit 1 and assuming perfect markets, the calculated beta for US real estate is closest to:
A.0.38.
B.0.58.
C.1.08.
*
这里的βi好像不是ST model里面那个RP^G=β_(i,GM)*RP_GM的那个?答案说βi = Cov(Ri,RM)/Var(RM)
所以β_(i,GM)是怎么表述的?老师说β_(i,GM)=ρ_(i,GM)*(σi/σGM),那这两个β有什么区别?