RT Journal Article SR Electronic T1 How Good is Investment Advice for Individuals? JF The Journal of Portfolio Management FD Institutional Investor Journals SP 32 OP 36 DO 10.3905/jpm.1977.32 VO 3 IS 2 A1 Lawrence Shepard YR 1977 UL https://pm-research.com/content/3/2/32.abstract AB