PT - JOURNAL ARTICLE AU - Robert G. Kirby TI - The Key Word is “Passive” AID - 10.3905/joi.2.1.21 DP - 1993 Feb 28 TA - The Journal of Investing PG - 21--22 VI - 2 IP - 1 4099 - https://pm-research.com/content/2/1/21.short 4100 - https://pm-research.com/content/2/1/21.full