RT Journal Article SR Electronic T1 Models of long-term interest rate determination JF The Journal of Portfolio Management FD Institutional Investor Journals SP 35 OP 45 DO 10.3905/jpm.1980.408748 VO 6 IS 3 A1 Benjamin M. Friedman A1 V. Vance Roley YR 1980 UL https://pm-research.com/content/6/3/35.abstract AB