RT Journal Article SR Electronic T1 Factor models, CAPMs,and the ABT JF The Journal of Portfolio Management FD Institutional Investor Journals SP 21 OP 25 DO 10.3905/jpm.1984.408982 VO 11 IS 1 A1 William F. Sharpe YR 1984 UL https://pm-research.com/content/11/1/21.abstract AB