TY - JOUR T1 - Editor’s Letter JF - The Journal of Index Investing SP - 2 DO - 10.3905/jii.2013.4.2.002 VL - 4 IS - 2 A2 - Bruce, Brian R. Y1 - 2013/08/31 UR - https://pm-research.com/content/4/2/2.abstract N2 - ER -