'It finds that it took female employees 8.5 years longer than their male colleagues, on average, to achieve associate professor status.
It then took a further 6.1 years more for women to secure full professorships, according to lead author Richard Harris, professor of economics'.
The issue is if 100 men are trying to be professors and only 15 women then the women are naturally less likely to get a place.
That's why women wait longer on average. Its a shallow market.