He is a nationally recognized organizational and medical sociologist in the study of U.S. health reform implementation, health care quality, primary care, and physician behavior. In addition, he is a leading voice on the use of qualitative methods in health services research. He has published over 40 articles, several book chapters, and a full-length book entitled Practice Under Pressure: Primary Care Physicians and Their Work in the 21st Century, a sociological analysis of the everyday world of primary care physicians, which received an Outstanding Academic Title award from Choice Magazine in 2010.