Getting ready for work in the morning, looking primped and polished, can be a major time suck. Earlier this year, at the Economy conference, banking executive Sallie Krawcheck quipped that even if women spent just 15 minutes each workday morning on hair and makeup, that's more than 60 hours a year or about two and a half full days ─ just getting ready for work. So are those hours worth it? For a man, it can help. For a woman, is not so much. A study cited in the Harvard Business Review found that for women, an increase in personal grooming time is associated with lower earnings. (The data comes from federal time-use surveys; grooming is defined as time spent washing and dressing oneself, including brushing, shaving, getting dressed, choosing and changing clothes, combing hair, applying moisturizers, etc.) For instance, if a white woman doubles her daily grooming from 45 minutes to a whopping 90 minutes, her earnings drop an average of 3.4%, found the study by researchers at Elon University. The researchers in the paper say the earnings drop may have to do with the negative stereotypes associated with an overly groomed woman in the workplace. For men, it depends on race. The researchers say grooming may counter negative stereotypes of minority men.

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