PT - JOURNAL ARTICLE AU - Peter L. Bernstein TI - Of knowledge and information AID - 10.3905/jpm.1980.408759 DP - 1980 Jul 31 TA - The Journal of Portfolio Management PG - 4--4 VI - 6 IP - 4 4099 - https://pm-research.com/content/6/4/4.short 4100 - https://pm-research.com/content/6/4/4.full