Most U.S. physicians feel a responsibility to help make health care leaner by containing health costs, but many are less enthusiastic about cost-reducing strategies that involve changes in payment models, according to a new study from the Mayo Clinic and University of Michigan. “Physicians clearly struggle with considering resource constraints and their patients' interests,” says senior author Dr. Susan Dorr Goold, professor of health management and policy and internal medicine at the University of Michigan School of Public Health and Medical School and newly-elected chair of the American Medical Association Council on Ethical and Judicial Affairs.