Tyler Cowen cites the “politically incorrect paper of the day” on female tennis players and wages:
Female tennis players play more conservatively and commit more unforced errors when playing critical points. Does this explain the upper-echelons wage gap?
[...]
Women are significantly more likely to hit unforced errors at the most crucial stages of the match, while men exhibit no significant variation in performance. Specifically, about 30% of men’s points end in unforced errors, regardless of their placement in the distribution of the importance variable. For women, about 36% of points in the bottom quartile of the importance distribution end in unforced errors, but unforced errors rise to nearly 40% for points in the top quartile of the importance distribution. What is remarkable is not the difference in the levels (men are more powerful and therefore more likely to hit winners at any stage). The interest lies in the differences in the way men and women respond to increases in competitive pressure.