RT Journal Article SR Electronic T1 Dividend yields and the January effect JF The Journal of Portfolio Management FD Institutional Investor Journals SP 54 OP 60 DO 10.3905/jpm.1986.409042 VO 12 IS 2 A1 Donald B. Keim YR 1986 UL https://pm-research.com/content/12/2/54.abstract AB