First year I've felt like reporting information to my government science funding agency is potentially... risky. I'll probably still report, now that I have the protections of tenure, but it makes me sad for both science and the study of science.

The most dramatic gap we find is that of gender homophily in the tendency to collaborate. Homophily operates across all regions and all subject areas, with implications for women’s downstream research productivity, especially where the representation of women is limited.

We use network analysis of Scopus from 2009-2013 to look at first- and second-degree ties among 1 million+ co-authors. While second-order collaborations look similar, men have greater first-degree ties.