RT Journal Article SR Electronic T1 Are the Reports of Beta's Death Premature? JF The Journal of Portfolio Management FD Institutional Investor Journals SP 51 OP 62 DO 10.3905/jpm.1993.51 VO 19 IS 4 A1 Louis K.C. Chan A1 Josef Lakonishok YR 1993 UL https://pm-research.com/content/19/4/51.abstract AB