Two interesting points from a Payscale article

Payscale for those who don't know is an organization that collects wage information broken down by finely detailed job description and location. Periodically they produce a report about gender pay differences, which is informative and seems unbiased.

Fact 1: It looked at the seven college majors with the highest starting salaries. More men than women majored in six of them, with pharmacy being the one exception. Note, it did not include law or medicine (postgraduate degrees) which have an increasing number of females.

Likewise, women were the majority in 6 of the 7 majors with the lowest starting salaries, with theology being the exception.

Fact 2: The report also looked at the most commonly-held job for men and the most commonly-held job for women in each state and looked at the average salary for each. The only state where the pay for the most commonly-held job for females paid more than the most commonly-held job for males in that state was that great left-wing state of Montana. (mam don't let your sons grow up to be cowboys is that lesson)