Women are employed in lower paying careers, such as child care and education, at a higher rate than men. They take time out of the workforce to care for children or aging parents. Also, women take time off to care of ill children more often than men. Lastly, men on average put in longer hours during their careers even when additional compensation is not offered.
There should be no reason for a gender pay gap. There are no specific jobs that men can do that women can't do unless we are dealing in the reproductive process or sexual response. But when it comes to the professional work place women can do the same jobs as men and they should be getting paid the same amount as their male counterparts.
20 years ago, a woman worked, had children and then stayed at home as their primary caregiver. Now, men, grandparents, better childcare and flexible working means that women no longer have a 'four year gap' from the workplace as they have done previously. Why has the pay gap remained the same?
There are mitigating factors to explain the gender pay gap. Just ask Hillary Clinton who pays women less than men on her staff. The gender pay gap is a myth. If it were true every company worth a grain of salt would hire women to keep costs down and increase profits. Women are paid less because they either have less experience, lesser degrees or work less hours, or some combination of the above.