PT - JOURNAL ARTICLE AU - Gordon J. Alexander TI - Efficient Sets, Short-Sellling, and Estimation Risk AID - 10.3905/jpm.1995.409505 DP - 1995 Jan 31 TA - The Journal of Portfolio Management PG - 64--73 VI - 21 IP - 2 4099 - https://pm-research.com/content/21/2/64.short 4100 - https://pm-research.com/content/21/2/64.full