The Mathematics of Sex: How Biology and Society Conspire to Limit Talented Women and Girls, by Stephen Ceci and Wendy Williams, has shifted the debate on the dearth of women in math-intensive fields. Published last September by Oxford University Press, it reaches a surprising conclusion: the reason why so few women hold tenure-track positions in engineering, physics, and mathematics departments is simply because they choose not to enter those fields—and if they do, they tend to leave them in large numbers.  Read more