The National Institutes of Health today launched a multidisciplinary network of experts who will explore new approaches to understanding the origins of health disparities, or differences in the burden of disease among population groups. Using state-of-the-science conceptual and computational models, the network’s goal is to identify important areas where interventions or policy changes could have the greatest impact in eliminating health disparities. The Office of Behavioral and Social Sciences Research (OBSSR), part of NIH, is contracting with the University of Michigan’s School of Public Health, Ann Arbor, to establish the Network on Inequality, Complexity, and Health (NICH).