Dr. Crystal is a leading social and behavioral scientist; his numerous published works have been highly influential in substance use and treatment, mental and behavioral health, and health policy. He has led many R-01 projects funded by NIDA, NIMH, and AHRQ, as well as the AHRQ-funded Center for Education and Research on Mental Health Therapeutics. This work has contributed to the development of more effective public systems and health policies for delivering evidence-based treatment for individuals with behavioral health needs. He has been a national leader in generating evidence on the comparative effectiveness of strategies for addressing behavioral health challenges in publicly funded populations.