PT - JOURNAL ARTICLE AU - William T. Ziemba TI - Comment on ”Why a Weekend Effect?“ AID - 10.3905/jpm.1993.93 DP - 1993 Jan 31 TA - The Journal of Portfolio Management PG - 93--99 VI - 19 IP - 2 4099 - https://pm-research.com/content/19/2/93.short 4100 - https://pm-research.com/content/19/2/93.full