RT Journal Article SR Electronic T1 Required accuracy for successful asset allocation JF The Journal of Portfolio Management FD Institutional Investor Journals SP 12 OP 19 DO 10.3905/jpm.1990.409302 VO 17 IS 1 A1 Roger G. Clarke A1 Michael T. FitzGerald A1 Philip Berent A1 Meir Statman YR 1990 UL https://pm-research.com/content/17/1/12.abstract AB