Evan L. Ray

UMass Amherst Research Assistant Professor of Biostatistics Evan Ray
Research Assistant Professor
elray@umass.edu

Education: 

B.S., University of Massachusetts, Boston; M.S., University of Massachusetts, Amherst; Ph.D., University of Massachusetts, Amherst; Postdoctoral Research Associate, Biostatistics, University of Massachusetts, Amherst

Area(s) of Specialization: 

time series, forecasting, infectious disease

Research Description: 

My research focuses on non-parametric and flexible parametric models for prediction and classification tasks with time series data that are relevant to public health. In the last few years, this work has centered on forecasting infectious diseases such as Dengue fever, influenza, and COVID-19. I have developed forecasting models using kernel conditional density estimation, copulas, and hierarchical splines or Gaussian processes, as well as ensemble methods to combine forecasts from multiple individual models. In my Ph.D. dissertation I developed approaches to classifying physical activity using accelerometer data, using conditional random field models in combination with random forests or gradient tree boosting.

Key Publications: 

Ray EL, Qian J, Brecha R, Reilly MP, and Foulkes AS (2019). Stochastic imputation for integrated transcriptome association analysis of a longitudinally measured trait. Statistical Methods in Medical Research. DOI: 10.1177/0962280219852720.

Ray EL and Reich NG (2018). Prediction of infectious disease epidemics via weighted density ensembles. PLOS Computational Biology 14(2): e1005910

Ray EL, Sasaki JE, Freedson PS, and Staudenmayer J (2018). Physical Activity Classification with Dynamic Discriminative Methods. Biometrics. DOI: 10.1111/biom.12892

Ray EL, Sakrejda, K, Lauer, SA, Johansson, MA, and Reich, NG (2017). Infectious disease prediction with kernel conditional density estimation. Statistics in Medicine, 36:4908–4929.