Women tend to choose occupations that are safer and cleaner than those chosen by men. It is also interesting to note that women tend to avoid occupations where the work is largely unstructured (eg, policing) and where the work tends to involve problem solving (eg, engineering).
Research conducted in the US and Scandanavia showed a 3% work efficiency difference between men and women in favour of men in blue collar industries. This was a small but stastically significant result. A significant difference has been observed in the output of research papers by post graduate students. Professional men work on average significantly longer hours than professional women.
OECD data showed that when paid & unpaid work are added together men and women do virtually the same amount of work, despite feminists always claiming women do more work. Men also tend to have significantly longer commutes than women.