%0 Journal Article %A Peter L. Bernstein %T The discomforts of efficiency %D 1987 %R 10.3905/jpm.1987.409130 %J The Journal of Portfolio Management %P 1-3 %V 14 %N 1 %U https://jpm.pm-research.com/content/iijpormgmt/14/1/1.full.pdf