RT Journal Article SR Electronic T1 Reply JF The Journal of Portfolio Management FD Institutional Investor Journals SP 77 OP 78 DO 10.3905/jpm.1980.408733 VO 6 IS 2 A1 Dennis E. Logue A1 Richard J. Rogalski YR 1980 UL https://pm-research.com/content/6/2/77.abstract AB