RT Journal Article SR Electronic T1 The Myth of the Two-Tier Market JF The Journal of Portfolio Management FD Institutional Investor Journals SP 29 OP 31 DO 10.3905/jpm.1976.408579 VO 2 IS 4 A1 James S. Ang YR 1976 UL https://pm-research.com/content/2/4/29.abstract AB