RT Journal Article SR Electronic T1 Should We Believe the Tests of Market Efficiency? JF The Journal of Portfolio Management FD Institutional Investor Journals SP 49 OP 54 DO 10.3905/jpm.1986.49 VO 12 IS 4 A1 O. Maurice Joy A1 Charles P. Jones YR 1986 UL https://pm-research.com/content/12/4/49.abstract AB