RT Journal Article SR Electronic T1 The trouble with performance measurement JF The Journal of Portfolio Management FD Institutional Investor Journals SP 74 OP 76 DO 10.3905/jpm.1988.409143 VO 14 IS 2 A1 J. D. Jobson A1 Robert M. Korkie YR 1988 UL https://pm-research.com/content/14/2/74.abstract AB