PT - JOURNAL ARTICLE AU - Paul A. Samuelson TI - Challenge to judgment AID - 10.3905/jpm.1974.408496 DP - 1974 Oct 31 TA - The Journal of Portfolio Management PG - 17--19 VI - 1 IP - 1 4099 - https://pm-research.com/content/1/1/17.short 4100 - https://pm-research.com/content/1/1/17.full