PT - JOURNAL ARTICLE AU - Arlene Erlich Bearman AU - Betsey Epstein Kuhn TI - A test of efficiency AID - 10.3905/jpm.1981.408825 DP - 1981 Oct 31 TA - The Journal of Portfolio Management PG - 44--47 VI - 8 IP - 1 4099 - https://pm-research.com/content/8/1/44.short 4100 - https://pm-research.com/content/8/1/44.full