TY - JOUR T1 - Editor’s Letter JF - The Journal of Index Investing SP - 1 DO - 10.3905/jii.2019.10.1.001 VL - 10 IS - 1 AU - Brian R. Bruce Y1 - 2019/05/31 UR - https://pm-research.com/content/10/1/1.abstract N2 - ER -