Ichiro Kawachi, SV Subramanian (Subu), Nancy Krieger, and David R. Williams are among the top 25 most productive researchers in the field of health inequalities, according to a study published in the journal Social Science & Medicine. The four Harvard Pop Center faculty members have published 462 studies, in total, on health inequalities between 1966 – 2014. In addition, the study ranked Social Science & Medicine, with co-editors-in-chief Kawachi and Subramanian, as the most productive journal in the field of health inequalities, accounting for 38% of all publications on the topic. Publications on health inequalities by Kawachi, Krieger and Williams were among the top 25 most cited.