RT Journal Article SR Electronic T1 The Theoretical Challenge to Index Funds JF The Journal of Portfolio Management FD Institutional Investor Journals SP 46 OP 51 DO 10.3905/jpm.1977.408624 VO 4 IS 1 A1 Edmond D. Villani YR 1977 UL https://pm-research.com/content/4/1/46.abstract AB