Justin Wolfers reports on some interesting research in an article, "When Teamwork Doesn't Work for Women", that appeared in the New York Times on January 8, 2016. The article summarizes research conducted by Heather Sarsons as an economics Ph.D. student at Harvard. She collected and analyzed data that suggests that the underrepresentation of women in tenured university professorships in the USA reflects systematic bias in how credit is given for co-authored articles. Essentially, female economists do not get full credit for collaborative work done with male economists. The full article, "Gender Differences in Recognition for Group Work" is available here.