PT - JOURNAL ARTICLE AU - Jeffrey Halpern AU - Jim K. Liew TI - Invited Editorial Comment AID - 10.3905/jpm.2012.38.3.001 DP - 2012 Apr 30 TA - The Journal of Portfolio Management PG - 1--2 VI - 38 IP - 3 4099 - https://pm-research.com/content/38/3/1.short 4100 - https://pm-research.com/content/38/3/1.full