RT Journal Article SR Electronic T1 The Key Word is “Passive” JF The Journal of Investing FD Institutional Investor Journals SP 21 OP 22 DO 10.3905/joi.2.1.21 VO 2 IS 1 A1 Robert G. Kirby YR 1993 UL https://pm-research.com/content/2/1/21.abstract AB