When you control for hours worked, time away for family, occupation, and other critical factors, that "pay gap" goes away. This also reminds me that, although there may be a "glass ceiling" for women, there's also a "glass floor" that they stand on above the truly rough and dangerous jobs.

Men are far more likely to choose careers that are more dangerous, so they naturally pay more. ...

Men are far more likely to work in higher-paying fields and occupations (by choice). ...

Men are far more likely to take work in uncomfortable, isolated, and undesirable locations that pay more.

Men work longer hours than women do. The average fulltime working man works 6 hours per week or 15 percent longer than the average fulltime working woman.

Men are more likely to take jobs that require work on weekends and evenings and therefore pay more.

Even within the same career category, men are more likely to pursue high-stress and higher-paid areas of specialization. ...

Women business owners make less than half of what male business owners make, which, since they have no boss, means it's independent of discrimination.

Via The Gender Pay Gap is a Complete Myth - CBS News.