PT - JOURNAL ARTICLE AU - Keith P. Ambachtsheer TI - Active Management that Adds Value AID - 10.3905/jpm.1994.89 DP - 1994 Oct 31 TA - The Journal of Portfolio Management PG - 89--92 VI - 21 IP - 1 4099 - https://pm-research.com/content/21/1/89.short 4100 - https://pm-research.com/content/21/1/89.full