PT - JOURNAL ARTICLE AU - Jamie Heard TI - Investor Responsibility AID - 10.3905/jpm.1978.12 DP - 1978 Apr 30 TA - The Journal of Portfolio Management PG - 12--14 VI - 4 IP - 3 4099 - https://pm-research.com/content/4/3/12.short 4100 - https://pm-research.com/content/4/3/12.full