RT Journal Article SR Electronic T1 Economic Disciplines for Economic Disciples JF The Journal of Portfolio Management FD Institutional Investor Journals SP 61 OP 65 DO 10.3905/jpm.1975.408515 VO 1 IS 2 A1 Roy E. Moor YR 1975 UL https://pm-research.com/content/1/2/61.abstract AB