Yes it is a very simplistic explanation to why genders tend to gravitate to one job or another. And yes, I'm saying that most, but not all of the disparities

Yes it is a very simplistic explanation to why genders tend to gravitate to one job or another. And yes, I'm saying that most, but not all of the disparities are biological and while it's a great idea to encourage women to pick higher paying jobs, we're at a point in time where we'll see diminishing returns in those attempts. For the same position with the same experience, in roughly the same location, I'd be very much surprised if the AVERAGE/MEAN pay gap is more than a single digit percent across an industry. By all means go after those X% numbers, teach women to negotiate more, assert themselves and so on, but I think you'll end up with numbers similar to the ones in this study -- a couple percent improvement. What I'm trying to say is there's no conspiracy against women earning more in the western world.