Study (N=806 orgs; 1971-2015) finds some DEI practices increase managerial diversity while others decrease it:  
Increase: hiring chief diversity officer, mentoring, childcare, flextime, parental leave, empowering training, targeted recruitment, diversity goals increase diversity  
Decrease: Perf evals, harassment training, grievance procedures, job tests   
Mixed results: Cross-training, employee resource groups, self-managed teams, skills training  
<https://hbr.org/2024/06/research-the-most-common-dei-practices-actually-undermine-diversity>