RT Journal Article SR Electronic T1 Specific Risk as a Public Good JF The Journal of Portfolio Management FD Institutional Investor Journals SP 1 OP 1 DO 10.3905/jpm.19.4.1 VO 19 IS 4 A2 Peter L. Bernstein YR 1993 UL https://pm-research.com/content/19/4/1.abstract AB