RT Journal Article SR Electronic T1 A risk premium model for market timing JF The Journal of Portfolio Management FD Institutional Investor Journals SP 33 OP 35 DO 10.3905/jpm.1985.409014 VO 11 IS 4 A1 Edward F. Renshaw YR 1985 UL https://pm-research.com/content/11/4/33.abstract AB