RT Journal Article SR Electronic T1 The State of Play for Popular Investment Models: A Practical Assessment JF The Journal of Portfolio Management FD Institutional Investor Journals SP 6 OP 7 DO 10.3905/jpm.2021.47.5.006 VO 47 IS 5 A1 Cathy Scott YR 2021 UL https://pm-research.com/content/47/5/6.abstract AB