Dr. Roddy's research interests focus on the economics of substance use, recovery and re-entry. She is an expert on injection drug use, marijuana use and policy, and sex work. She is a trained facilitator in restorative conferencing. Her work has been funded by local, regional, and national agencies including the National Institute on Drug Abuse, the Robert Wood Johnson Foundation, the Graham Environmental Sustainability Institute, the Urban Research Center, and the Michigan Institute for Community Health Research.She has published many journal articles and book chapters and presents regularly at national meetings. She participates in program evaluations regularly, most often leading the cost-effective or cost-benefit analysis, but often contributing to the qualitative sections as well. Her most recent contribution to program evaluation examined the effectiveness of the Wayne County Mental Health Court. Dr. Roddy serves on the University of Michigan-Ann Arbor Institutional Review Board as oversight for human subjects research.