RT Journal Article SR Electronic T1 Portfolio performance, managerial ownership, and the size effect JF The Journal of Portfolio Management FD Institutional Investor Journals SP 33 OP 39 DO 10.3905/jpm.1990.409270 VO 16 IS 3 A1 George P. Tsetsekos A1 Richard A. DeFusco YR 1990 UL https://pm-research.com/content/16/3/33.abstract AB