TY - JOUR T1 - Editor’s Letter JF - The Journal of Index Investing SP - 1 DO - 10.3905/jii.2012.2.4.001 VL - 2 IS - 4 A2 - Bruce, Brian R. Y1 - 2012/02/29 UR - https://pm-research.com/content/2/4/1.abstract N2 - ER -