TY - JOUR T1 - Invited Editorial Comment JF - The Journal of Portfolio Management SP - 1 LP - 2 DO - 10.3905/jpm.2012.39.1.001 VL - 39 IS - 1 AU - Rob Arnott Y1 - 2012/10/31 UR - https://pm-research.com/content/39/1/1.abstract N2 - ER -