Pay gap and it's existence or not is still a controversial topic so i stay away from making claims about this. But why don't we take a step back and see why it could be.
So, the $ in your paychecks would directly relate to the job you do right? Now, the kind of job women have compared to men may be a factor. You mention this in your article. Have you thought about why women go for non-STEM fields of study and therefore, occupation? Why there's less women in executive positions in a lot of companies?
RE: The Gender Wage gap. NEWS FLASH: its a myth.