RT Journal Article SR Electronic T1 Editor’s Introduction for 2021 Special Issue on Factor Investing JF The Journal of Portfolio Management FD Institutional Investor Journals SP 1 OP 3 DO 10.3905/jpm.2020.47.2.001 VO 47 IS 2 A1 Frank J. Fabozzi YR 2020 UL https://pm-research.com/content/47/2/1.abstract AB