hmm the 50% number comes from https://www.accenture.com/_acnmedia/PDF-134/Accenture-A4-GWC..., which seems to get the figure from a 2016 study (https://www.ncwit.org/sites/default/files/resources/womenint...), which seems to get it from a 2008 study performed by https://coqual.org/, which describes itself as a d&i thinktank. Also the reason cited for leaving appears to come from a later, different survey? Just skimmed all this but article seems kinda sketchy.