PT - JOURNAL ARTICLE ED - Bruce, Brian R. TI - Editor’s Letter AID - 10.3905/jii.2012.2.4.001 DP - 2012 Feb 29 TA - The Journal of Index Investing PG - 1 VI - 2 IP - 4 4099 - https://pm-research.com/content/2/4/1.short 4100 - https://pm-research.com/content/2/4/1.full