RT Journal Article SR Electronic T1 Research on Risk and Return JF The Journal of Portfolio Management FD Institutional Investor Journals SP 15 OP 21 DO 10.3905/jpm.1991.15 VO 17 IS 3 A1 Ravi Shukla A1 Charles A Trzcinka YR 1991 UL https://pm-research.com/content/17/3/15.abstract AB