PT - JOURNAL ARTICLE AU - Paul A. Samuelson TI - Paradise Lost & Refound AID - 10.3905/jpm.1987.4 DP - 1987 Apr 30 TA - The Journal of Portfolio Management PG - 4--9 VI - 13 IP - 3 4099 - https://pm-research.com/content/13/3/4.short 4100 - https://pm-research.com/content/13/3/4.full