Question

In a study conducted by Jagannathan and Wang, it was found that the performance of beta in explaining security returns could be considerably enhanced by:
I. Including the unsystematic risk of a stock
II. Including human capital in the market portfolio
III. Allowing for changes in beta over time
A. I and II only
B. II and III only
C. I and III only
D. I, II, and III

Answer

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