Many articles have taken a crack at explaining the lack of diversity in the asset management industry.  This New York Times article from January, 2017 reflects on the possible causes, as well as the returns that investors might unknowingly be leaving on the table.  Investment management is but one example where greater cognitive diversity results in better performance and returns.

https://www.nytimes.com/2017/01/13/business/mutfund/a-trillion-dollar-question-why-dont-more-women-run-mutual-funds.html