Women earn less than men because they carry out more domestic chores such as cooking and cleaning, according to research by Mark Bryan of ISER at the University of Essex and Almudena Sevilla Sanz of the University of Oxford. Women in couples spend up to eight hours a week more than their partners on housework and much of it is done late in the day when men are putting in extra time at the office. By contrast, men usually do chores such as gardening or repairs that can be put off until the weekend and so do not affect their careers. Read Press Release and the full report .