RT Journal Article SR Electronic T1 Active Management that Adds Value JF The Journal of Portfolio Management FD Institutional Investor Journals SP 89 OP 92 DO 10.3905/jpm.1994.89 VO 21 IS 1 A1 Keith P. Ambachtsheer YR 1994 UL https://pm-research.com/content/21/1/89.abstract AB