TY - JOUR T1 - Editor’s Letter JF - The Journal of Index Investing SP - 1 DO - 10.3905/jii.2018.9.1.001 VL - 9 IS - 1 AU - Brian R. Bruce Y1 - 2018/05/31 UR - https://pm-research.com/content/9/1/1.abstract N2 - ER -