Her expertise is in the field of mental health and substance use treatment services and cost and the effects of policy and organizational changes on the care of individuals using public sector health care systems. She has conducted studies of the seriously mentally ill population evaluating the effectiveness and cost efficiency of new treatment programs, monitoring the effects of changes in reimbursement models and integration of health and behavioral health treatment approaches. She has developed a longitudinal and integrated data base to use in these studies employing multiple data sources. Her modeling work has involved data envelopment analysis techniques to identify best practices (DEA), queuing models to describe system capacity and cost effectiveness models to support management and policy decisions.