Matthew received his PhD from Arizona State University in 2018. He has two main areas of research. First, his research consists of bridging the gap between modern causal mediation methods and currently accepted statistical mediation methods in the health and social sciences. Second, his research involves developing and evaluating statistical mediation analysis methods in the context of longitudinal data and preventive interventions. In addition to his focal research, Matthew has assisted with data analytic issues on several federally funded projects evaluating effects of health intervention programs.