It's long been known that attractive people tend to make more money than unattractive people. However, researchers took this a step farther to see what role grooming plays into being considered "attractive." They found that the more "groomed" a woman was perceived as being, the more money she made. In essence, it pays to spend more time to look good.
The study found that men had to do less in order to be seen as "well groomed." The researchers said, "Further, while both conventional wisdom and previous research suggest the importance of attractiveness might vary by gender, we find no gender differences in the attractiveness gradient. However, we do find that grooming accounts for the entire attractiveness premium for women, and only half of the premium for men."
Being of equal attractiveness, women tend to do as well as men until it comes to getting managerial positions. When females are being considered for top level positions, attractiveness can be seen as a negative. In essence, women need to be well groomed but not too attractive. Sounds easy enough.