TY - JOUR T1 - Editor’s Letter JF - The Journal of Index Investing SP - 1 DO - 10.3905/jii.2019.10.3.001 VL - 10 IS - 3 AU - Brian Bruce Y1 - 2019/11/29 UR - https://pm-research.com/content/10/3/1.abstract N2 - ER -