One case in point is that of work experience. We have information on the amount of full-year, full-time work experience of men and women, which is a great indicator for wages. However, we're missing information on the continuity of that work experience, the frequency of labour force withdrawals, the timing of those withdrawals, and the duration of those withdrawals.
You can imagine a situation in which a woman is anticipating frequent interruptions to her career, so she may be in lower-wage jobs, jobs that are easier to exit and enter into, for example.