RT Journal Article SR Electronic T1 The Social Sciences and the Unknown Future JF The Journal of Portfolio Management FD Institutional Investor Journals SP 66 OP 76 DO 10.3905/jpm.1975.408543 VO 1 IS 4 A1 Frederick R. Macaulay YR 1975 UL https://pm-research.com/content/1/4/66.abstract AB