Gender bias in accepting pull-requests [pdf]

There is an argument to be made in the sample size. More men than women make pull requests. Women don't have as many accounts as men do on Github. The experience a man has will vary by his education and skills and a lot of men join without any skills or experience to get started in open source. Women are given special classes and mentors to learn how to code that men are not allowed.

These are factors on the test that could affect results.

A lot of men just join Github without any experience, so of course they will have less pull requests accepted and a lower size file. A lot of women are given special classes to learn how to code and assigned a mentor to teach them how to code better and these programs are only for women. Women generally don't take an interest in programming only making up 18% of computer science classes, but they get tuition discounts and other help for being a woman.

How do you arrive at that conclusion?