共 11 条
[4]
Ibbotson R., 1975, J FINANC ECON, V2, P235, DOI DOI 10.1016/0304-405X(75)90015-X
[6]
Logue D.E., 1973, J FINANC QUANT ANAL, V8, P91, DOI [10.2307/2329751, DOI 10.2307/2329751]