Matthew Leonard Maciejewski, PhD

Professor in Population Health Sciences
Professor in Medicine
Campus mail Duke Box 2720, Durham, NC 27705
Phone (919) 286-6936
Email address

Matt Maciejewski, PhD is a Professor in the Department of Population Health Sciences. He is also a Research Career Scientist and Director of the Health Economics and Policy Unit in the Center for Health Services Research in Primary Care at the Durham VA Medical Center. Matt also holds Adjunct Professor appointments in the Schools of Public Health and Pharmacy at the University of North Carolina at Chapel Hill.

He has research interests in four areas:

1) evaluation of surgical and behavioral interventions for the management of obesity and cardiometabolic conditions
2) evaluation of cost-sharing changes on demand for medications and health services
3) analysis of health care utilization and expenditures in experimental and quasi-experimental studies
4) methods for addressing unobserved confounding in observational studies.

Matt has received funding from NIDA, CMS, AHRQ, VA HSR&D, and the RWJ Foundation. He has published over 190 papers in peer-reviewed journals such as JAMA, JAMA Internal Medicine, JAMA Surgery, Annals of Internal Medicine, Health Economics, Medical Care, Health Services Research, Journal of Clinical Epidemiology and Diabetes Care.

Areas of expertise: Health Services Research, Health Economics, Health Policy, Multimorbidity

Education and Training

  • Ph.D., University of Minnesota, Twin Cities, 1998


Wong, Edwin S., Matthew L. Maciejewski, Paul L. Hebert, Ashok Reddy, and Chuan-Fen Liu. “Predicting Primary Care Use Among Patients in a Large Integrated Health System: The Role of Patient Experience Measures..” Med Care 57, no. 8 (August 2019): 608–14.

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Maciejewski, Matthew L., and M Alan Brookhart. “Using Instrumental Variables to Address Bias From Unobserved Confounders..” Jama 321, no. 21 (June 4, 2019): 2124–25.

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Maciejewski, Matthew L., Bradley G. Hammill, Laura Ding, Lesley H. Curtis, Elizabeth A. Bayliss, Abby F. Hoffman, and Virginia Wang. “Care continuity impacts medicare expenditures of older adults: Fact or fiction?.” Healthc (Amst), May 30, 2019.

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Norton, Edward C., Bryan E. Dowd, and Matthew L. Maciejewski. “Marginal Effects-Quantifying the Effect of Changes in Risk Factors in Logistic Regression Models..” Jama 321, no. 13 (April 2, 2019): 1304–5.

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Routh, Jonathan C., Steven Wolf, Rohit Tejwani, Ruiyang Jiang, Gina-Maria Pomann, Benjamin A. Goldstein, Matthew L. Maciejewski, and Alexander C. Allori. “Early Impact of the Patient Protection and Affordable Care Act on Delivery of Children's Surgical Care..” Clin Pediatr (Phila) 58, no. 4 (April 2019): 453–60.

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Maciejewski, Matthew L., and Bradley G. Hammill. “Measuring the burden of multimorbidity among Medicare beneficiaries via condition counts and cumulative duration..” Health Serv Res 54, no. 2 (April 2019): 484–91.

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