Stacey E. Alexeeff, PhD, is a research scientist biostatistician at the Kaiser Permanente Northern California Division of Research. She earned her MSc in Statistics at Carnegie Mellon University in 2009 and her PhD in Biostatistics from Harvard University in 2013. Dr. Alexeeff's methodological areas of interest include spatial models, mixed effects modeling, longitudinal analysis techniques, measurement error, and gene-environment interaction tests. Her research in environmental epidemiology has focused on the health effects of ambient air pollution exposures across cardiovascular and respiratory systems, with particular emphasis on spatial models of air pollution and measurement error properties of these prediction models. Currently, Dr. Alexeeff is involved with ongoing research projects at the Division of Research, including studies of genetic and environmental risk factors for disease, intervention studies, and diagnostic prediction modeling.