PT - JOURNAL ARTICLE AU - Gary L. Bergstrom TI - A New Route to Higher Returns and Lower Risks AID - 10.3905/jpm.1975.408545 DP - 1975 Oct 31 TA - The Journal of Portfolio Management PG - 30--38 VI - 2 IP - 1 4099 - https://pm-research.com/content/2/1/30.short 4100 - https://pm-research.com/content/2/1/30.full