Working with clients on Gender pay gap reporting leaves me with mixed feelings. There is a lot of great work but we have been at this for so long and it does make me wonder why we have not found the solution to what shouldn't be a difficult problem but is. 

This article is one of the best I have come across in looking at the source of the problem in a really user friendly way

https://www.vox.com/2016/8/1/12108126/gender-wage-gap-explained-real