PT - JOURNAL ARTICLE ED - Bruce, Brian R. TI - Editor’s Letter AID - 10.3905/jii.2013.4.1.002 DP - 2013 May 31 TA - The Journal of Index Investing PG - 2 VI - 4 IP - 1 4099 - https://pm-research.com/content/4/1/2.short 4100 - https://pm-research.com/content/4/1/2.full