RT Journal Article SR Electronic T1 Engineering Portfolios JF The Journal of Investing FD Institutional Investor Journals SP 8 OP 14 DO 10.3905/joi.4.4.8 VO 4 IS 4 A1 Bruce I. Jacobs A1 Kenneth N. Levy YR 1995 UL https://pm-research.com/content/4/4/8.abstract AB