RT Journal Article SR Electronic T1 Dispersion Measurement within a Size–Weighted Composite JF The Journal of Portfolio Management FD Institutional Investor Journals SP 46 OP 51 DO 10.3905/jpm.1993.409451 VO 19 IS 3 A1 Dwight D. Churchill A1 Steven A. Lee YR 1993 UL https://pm-research.com/content/19/3/46.abstract