%0 Journal Article %A Sanford J. Grossman %T Insurance seen and unseen %B The impact on markets %D 1988 %R 10.3905/jpm.1988.409164 %J The Journal of Portfolio Management %P 5-8 %V 14 %N 4 %U https://jpm.pm-research.com/content/iijpormgmt/14/4/5.full.pdf