PT - JOURNAL ARTICLE AU - Peter L. Bernstein TI - “Inadvertent subtracters” AID - 10.3905/jpm.9.3.4 DP - 1983 Apr 30 TA - The Journal of Portfolio Management PG - 4--4 VI - 9 IP - 3 4099 - https://pm-research.com/content/9/3/4.short 4100 - https://pm-research.com/content/9/3/4.full