TY - JOUR T1 - Editor’s Letter JF - The Journal of Index Investing SP - 1 DO - 10.3905/jii.2017.7.4.001 VL - 7 IS - 4 AU - Brian R. Bruce Y1 - 2017/02/28 UR - https://pm-research.com/content/7/4/1.abstract N2 - ER -