Report summary

Harvard University Department of Biostatistics in 2024-2026 reads as a 47-PI network with 26 internal PI collaborations. The research center of gravity is Biochemistry, Genetics and Molecular Biology as the leading field (21% of slots across 19 PIs; 19 labels), Molecular Biology as the leading subfield (13% of slots across 14 PIs; 14 labels), and Advanced Causal Inference Techniques as the leading topic (6% of slots across 8 PIs; 8 labels). Overall the pattern is balanced: there is enough structure to identify active groups, while the field mix still leaves room for multiple research identities. The most prominent PIs by weighted works are Tyler J. VanderWeele (20.4 weighted works; Psychological Well-being and Life Satisfaction, Health disparities and outcomes). The strongest pairings are Georg Hahn and Sharon M. Lutz (8 shared works, weight 2.6). The strongest breakdown groups are group 1 with 10 PIs, 10 internal connections, weight 6.3, around Molecular Biology, Genetics, Artificial Intelligence, led by Frank B. Hu, Molin Wang, Xihong Lin.