Our Focus issue on Gender equity in astronomy is centred around the research Letter by Neven Caplar and collaborators, "Quantitative evaluation of gender bias in astronomical publications from citation counts". The authors look at the citations that women- and men-led papers in astronomy receive and find that women-led papers are systematically undercited compared to those led by men. Their methodology, using advanced machine learning techniques, allows the authors to account for other, non-gender specific factors that might affect the citation count of the paper. These include the seniority of the lead author, their institution, the number of co-authors and the journal in which the paper is published. While there is a clear trend towards parity in terms of citations, there is still a systematic 10% deficit of citations for women-led papers. The authors analyse potential systematics in their methodology and they conclude that this deficit is probably under-estimated.
The results by Neven Caplar and colleagues are put into context in a News & Views piece written by Sarah Tuttle, "The power of being counted". Tuttle reflects on the importance of data but also highlights the pitfalls of such purely data-driven works; for example, authors using only their initials or those who do not identify with their birth gender would be miscounted by Caplar et al. The News & Views piece makes a plea for already established astronomers to move beyond the adage of "Where are the data?" and instead, as a first step, do their homework to educate themselves and then join the fight for equity in astronomy.
"Curiosity and the end of discrimination" by Chanda Prescod-Weinstein offers a Perspective on the topic of intersectionality, "the interconnected nature of social categorizations such as race, class, and gender as they apply to a given individual or group, regarded as creating overlapping and interdependent systems of discrimination or disadvantage". Prescod-Weinstein explains that very often works like the one by Caplar et al. tend to — often inadvertently — erase the experiences of those people that suffer the most in our community. The piece urges us to be curious and to use all the tools at our disposal — most importantly the already established and experienced field of sociology that routinely deals with such issues — to root out discrimination.