RT Journal Article SR Electronic T1 Where are the Customers' Alphas? JF The Journal of Portfolio Management FD Institutional Investor Journals SP 52 OP 56 DO 10.3905/jpm.1977.52 VO 4 IS 1 A1 Keith P. Ambachtsheer YR 1977 UL https://pm-research.com/content/4/1/52.abstract AB