PT - JOURNAL ARTICLE AU - Haim Levy TI - The CAPM and the Investment Horizon AID - 10.3905/jpm.1981.408794 DP - 1981 Jan 31 TA - The Journal of Portfolio Management PG - 32--40 VI - 7 IP - 2 4099 - https://pm-research.com/content/7/2/32.short 4100 - https://pm-research.com/content/7/2/32.full