Ryan, Andrew M.

Methods for Evaluating Changes in Health Care Policy: The Difference-in-Differences Approach

Dimick, J. B., & Ryan, A. M. (2014) · JAMA

Healthcare Policy and ManagementEvaluation and Performance Assessment

Cited by 1,193

Why We Should Not Be Indifferent to Specification Choices for Difference‐in‐Differences

Ryan, A. M., Burgess, J. F., & Dimick, J. B. (2015) · Health Services Research

Advanced Causal Inference TechniquesEvaluation and Performance Assessment

Cited by 320

Variation in Physicians’ Electronic Health Record Documentation and Potential Patient Harm from That Variation

Cohen, G. R., Friedman, C. P., Ryan, A. M., Richardson, C. R., & Adler-Milstein, J. (2019) · Journal of General Internal Medicine

Electronic Health Records SystemsMedical Coding and Health Information

Cited by 117

Small Primary Care Physician Practices Have Low Rates Of Preventable Hospital Admissions

Casalino, L. P., Pesko, M. F., Ryan, A. M., Mendelsohn, J. L., Copeland, K. R., Ramsay, P. P., Sun, X., Rittenhouse, D. R., & Shortell, S. M. (2014) · Health Affairs

Primary Care and Health OutcomesHealthcare Policy and Management

Cited by 108

Comparative safety of sleeve gastrectomy and gastric bypass up to 5 years after surgery in patients with severe obesity.

Howard, R., Chao, G. F., Yang, J., Thumma, J., Chhabra, K., Arterburn, D. E., Ryan, A., Telem, D. A., & Dimick, J. B. (2021) · JAMA Surgery

Bariatric Surgery and OutcomesBody Contouring and Surgery

Cited by 94

Early impact of the 2011 ACGME duty hour regulations on surgical outcomes

Scally, C. P., Ryan, A. M., Thumma, J. R., Gauger, P. G., & Dimick, J. B. (2015) · Surgery

Hospital Admissions and OutcomesPatient Safety and Medication Errors

Cited by 36

Well‐Balanced or too Matchy–Matchy? The Controversy over Matching in Difference‐in‐Differences

Ryan, A. M. (2018) · Health Services Research

Advanced Causal Inference TechniquesMeta-analysis and systematic reviews

Cited by 28

Association of Hospital Participation in Bundled Payments for Care Improvement Advanced With Medicare Spending and Hospital Incentive Payments

Shashikumar, S. A., Gulseren, B., Berlin, N. L., Hollingsworth, J. M., Joynt Maddox, K. E., & Ryan, A. M. (2022) · JAMA

Healthcare Policy and ManagementHealthcare Quality and Management

Cited by 21

Difference-in-Differences for Health Policy and Practice: A Review of Modern Methods

Feng, S., Ganguli, I., Lee, Y., Poe, J., Ryan, A., & Bilinski, A. (2025) · Statistics in Medicine

Advanced Causal Inference TechniquesHealthcare Policy and Management

Cited by 16