Different companies may have different hiring practices.
So diversity (gender, location) may by a function of organizational participation.
If a company's hiring practices are consistent, and companies vary by participation in Working Groups, that could account for a lot of the variation of diversity in working groups.
Suggested by Stephen:
Different companies may have different hiring practices. So diversity (gender, location) may by a function of organizational participation.
If a company's hiring practices are consistent, and companies vary by participation in Working Groups, that could account for a lot of the variation of diversity in working groups.
This can be quantitatively measured.