TY - JOUR T1 - INVITED EDITORIAL JF - The Journal of Portfolio Management SP - 4 LP - 7 DO - 10.3905/jpm.2015.41.4.004 VL - 41 IS - 4 AU - David Blitz Y1 - 2015/07/31 UR - https://pm-research.com/content/41/4/4.abstract ER -