PT - JOURNAL ARTICLE AU - Peter L. Bernstein TI - The more things changeā€¦ AID - 10.3905/jpm.1982.408864 DP - 1982 Apr 30 TA - The Journal of Portfolio Management PG - 4--4 VI - 8 IP - 3 4099 - https://pm-research.com/content/8/3/4.short 4100 - https://pm-research.com/content/8/3/4.full