PT - JOURNAL ARTICLE AU - David Blitz TI - INVITED EDITORIAL AID - 10.3905/jpm.2015.41.4.004 DP - 2015 Jul 31 TA - The Journal of Portfolio Management PG - 4--7 VI - 41 IP - 4 4099 - https://pm-research.com/content/41/4/4.short 4100 - https://pm-research.com/content/41/4/4.full