Ok, so why are they less likely to negotiate, why are they more likely to ascend at less valuable companies, etc. The whole point of talking about the wage gap is figuring out why it exists. And inevitably, there are only two possible ends to this investigation. Either there are inherent biological differences that cause women to be less effective and valuable in our economy, or some societal manifestation of sexism is causing these differences. As far as I can tell there is no other possible answer.

Yep, that's correct. And it's almost certainly a mixture of the two. I'm not saying there isn't sexism involved, i'm just saying that it's more likely to be on the side of socializing young girls into choosing less remunerative professions.

Women are less likely to negotiate because of the societal views of women who are shrewd negotiators. The societal pressure on women to be passive is immense. Just look at women in politics for numerous examples. That's what's sexist about it. There are different expectations of people based solely on gender, and that further divides into race with black women at the bottom of that pool.

You need only listen to the experiences of women founders in Silicon Valley to realize your comment really doesn't match up with what really happens. Women, especially in the tech sector, are treated like personal sex objects of some VCs.

There is not a single situation you listed above that cannot be attributed to similarity bias or cultural bias against, both completely unintentional.