Layla Mosama Parast Bartroff is an American biostatistician whose research involves surrogate markers, predictive modelling, survival analysis, causal inference, and health care quality. Formerly a senior statistician and co-director of the Center for Causal Inference at the RAND Corporation, she is an associate professor of statistics and data sciences at the University of Texas at Austin.[1][2] She is also a frequent newspaper and news magazine editorial writer on issues related to public health, supported as a Public Voices Fellow of The OpEd Project.[3]