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I am the Director of the Center for Populations Health Research at Cleveland Clinic and a health services researcher with expertise in data science, risk prediction modeling, econometric analysis, and simulation. My research is grounded in collaborative, systems-based approaches to understanding heterogeneity in risk, treatment effectiveness, and outcomes among populations. I have expertise in methods for studying and modeling risk and treatment effectiveness heterogeneity, particularly with respect to populations defined according to socioeconomic position (SEP) and age. I have developed methods for evaluating real clinical treatment decisions within the context of model-recommended treatments which optimize outcome risk, and shown through this methodology that hospitals with greater rates of discordant therapy in relation to model recommendations have worse risk-adjusted outcomes.