RT Journal Article SR Electronic T1 Is Adjusting Beta Estimates an Illusion? JF The Journal of Portfolio Management FD Institutional Investor Journals SP 23 OP 26 DO 10.3905/jpm.1983.23 VO 10 IS 1 A1 Gabriel A. Hawawini A1 Ashok Vera YR 1983 UL https://pm-research.com/content/10/1/23.abstract AB