Report summary

For Harvard University Department of Environmental Health in 2015-2017, the graph shows 47 visible PIs and 84 internal PI collaborations. The main research signal is Environmental Science as the leading field (31% of slots across 28 PIs; 28 labels), Health, Toxicology and Mutagenesis as the leading subfield (21% of slots across 24 PIs; 24 labels), and Air Quality and Health Impacts as the leading topic (10% of slots across 13 PIs; 13 labels). That is a healthy pattern, with enough links to reveal several interpretable groups rather than one undifferentiated component. The most prominent PIs by weighted works are David C. Christiani (20.7 weighted works; Air Quality and Health Impacts, Heavy Metal Exposure and Toxicity). The clearest collaboration lines are Joel Schwartz and Petros Koutrakis (37 shared works, weight 10). The strongest breakdown groups are group 1 with 10 PIs, 14 internal connections, weight 58.8, around Health, Toxicology and Mutagenesis, Environmental Chemistry, Pollution, led by David C. Christiani, Joel Schwartz, Murray A. Mittleman.