I don't think you made it past the first table of numbers, which the author wasn't satisified with. Later in the article, Matthew Prestifilippo accounts for th

I don't think you made it past the first table of numbers, which the author wasn't satisified with. Later in the article, Matthew Prestifilippo accounts for the factors you mention (except salary negotiation) and lists various occupations in which women or men have pay advantages in the aggregate.