PT - JOURNAL ARTICLE AU - Mark Kritzman TI - Invited Editorial Comment AID - 10.3905/jpm.2011.37.2.003 DP - 2011 Jan 31 TA - The Journal of Portfolio Management PG - 3--5 VI - 37 IP - 2 4099 - https://pm-research.com/content/37/2/3.short 4100 - https://pm-research.com/content/37/2/3.full