RT Journal Article SR Electronic T1 Volatility, Growth, and Investment Policy JF The Journal of Portfolio Management FD Institutional Investor Journals SP 55 OP 59 DO 10.3905/jpm.1981.408798 VO 7 IS 2 A1 David A. Umstead YR 1981 UL https://pm-research.com/content/7/2/55.abstract AB