Although there exists a wealth of data relating to the British labour market, there are a number of important issues for which reliance has previously had to be placed on small surveys or case studies in order to form an option. Thus it has been known for some time that men and women cluster in different industries and occupations and that there are relatively few women in some jobs and rather a lot in others. Even so, no clear idea has been available of the extent to which men and women achi...