[alexbeloi]

It's really hard to prove discrimination on a small scale, both majority male and majority female companies are probably recruiting from their employees friend network, so it is very possible that neither is discriminating on the basis of sex.

Meaning, they are hiring in proportions which are consistent with their applicant pools, those pools are just different because of friend networks.

People that study these things always take a macroscopic view and talk about sexism/racism in the industry in aggregate and rarely in any specific company.