Dr. Haviland’s research focuses on causal analysis with observational data and analysis of longitudinal and complex survey data applied to policy issues in health and criminology. For example, she recently led a team of researchers assessing the effects of high deductible account-based health insurance plans on health care costs, use, and disparities in the most comprehensive study on the topic to date. Other health policy work involves assessing mechanisms for health disparities for Medicare recipients and exploring connections between patient safety and recent reductions in medical malpractice claims. An example of her work in criminology is methodological work extending group-based trajectory modeling (semi-parametric longitudinal mixture models) to address causal questions with application to assessing the effect of gang membership on violent delinquency.