Keck-Schaeffer Initiative for Population Health Policy

KSI Cover Photo

Our Mission

The mission of the Keck-Schaeffer Initiative for Population Health is to combine empirical, multidisciplinary and policy-driven research with clinical insight to develop high value strategies to improve the health of vulnerable populations.


Our Founders
USC Roski Eye Institute
Department of Emergency Medicine
Schaeffer Center for Health Policy & Economics
Steering Committee

Rohit Varma, MD, MPH
Carl Chudnofsky, MD
Chair, Department of Emergency Medicine
Dana Goldman, PhD
Director, Schaeffer Center for Health Policy & Economics

Seth Seabury, PhD
Director, Keck-Schaeffer Initiative for Population Health Policy

Seabury cropped

Michael Menchine, MD, MPH
Associate Director, Keck-Schaeffer Initiative for Population Health Policy

Menchine Headshot cropped

Sara Axeen, PhD
Associate Professor of Research in the Department of Emergency Medicine


Étienne Gaudette, PhD
Adjunct Research Professor
Department of Pharmaceutical and Health Economics in the School of Pharmacy


Hanke Heun-Johnson, PhD
Project Specialist

Hanke Headshot cropped

Khristina Ipapo, MPH
Research Programmer

Khristina Headshot cropped

Our History

The Keck-Schaeffer Initiative for Population Health Policy (KSI) is a collaboration between the Keck School of Medicine of USC and the USC Schaeffer Center for Health Policy & Economics. Housed in the USC Roski Eye Institute and created with support from the USC Department of Emergency Medicine and the Schaeffer Center, the KSI will foster multidisciplinary collaborations to generate new research and educational opportunities to study population health policy at the Keck School of Medicine.

Project Areas

The KSI is conducting cutting edge research designed to improve population health across several key areas. Currently, our ongoing work addresses the following topics:

In the News

Recent Publications


    1. Ly DP, Seabury SA, Jena AB. “Hours Worked Among US Dual Physician Couples With Children, 2000 to 2015.” JAMA Intern Med. Published online August 21, 2017. doi:10.1001/jamainternmed.2017.3437
    2. Schaffer AC, Jena AB, Seabury SA, Singh H, Chalasani V, Kachalia A. “Rates and Characteristics of Paid Malpractice Claims Among US Physicians by Specialty, 1992-2014.” JAMA Internal Medicine. 177(5): 710-718. 2017.
    3. Seabury, Seth A., Melissa A. Frasco, Emma van Eijndhoven, Steve Sison, and Christopher Zacker. “The impact of self-and physician-administered cancer treatment on work productivity and healthcare utilization.” Research in Social and Administrative Pharmacy (2017).
    4. Seabury, Seth A., Katalin Bognar, Yaping Xu, Caroline Huber, S. Renee Commerford, and Darren Tayama. “Regional disparities in the quality of stroke care.” The American Journal of Emergency Medicine (2017).
    5. Desai, Shoma, Phillip F. Gruber, Erick Eiting, Seth A. Seabury, Wendy J. Mack, Christian Voyageur, Veronica Vasquez, Hyung T. Kim, and Sophie Terp. “The Effect of Utilization Review on Emergency Department Operations.” Annals of Emergency Medicine (2017).
    6. Seabury SA, Terp S, Boden LI. “Racial And Ethnic Differences In The Frequency Of Workplace Injuries And Prevalence Of Work-Related Disability.” Health Affairs (Millwood); 36(2): 266-273. 2017.


    1. Arora S, Ford K, Terp S, Abramson T, Ruiz R, Camilon M, Coyne CJ, Lam CN, Menchine M, Burner E. Describing the evolution of mobile technology usage for Latino patients and comparing findings to national Health estimates. J Am Med Inform Assoc. 2016 Sep;23(5):979-83.
    2. Berona K, Abdi A, Menchine M, Mailhot T, Kang T, Seif D, Chilstrom M. Success of Ultrasound-Guided versus Landmark-Guided Arthrocentesis of Hip, Ankle, and Wrist in a Cadaver Model. Am J Emerg Med 2016 Oct 24 (16)30752-5.
    3. Conlon C, Asch S, Hanson M, Avins A, Levitan B, Roth C, Robbins M, Dworsky M, Seabury S, Nuckols T. Assessing the Value of High-Quality Care for Work-Associated Carpal Tunnel Syndrome in a Large Integrated Health Care System: Study Design. Perm J. 2016 Fall;20(4):87-95.
    4. Ford K, Menchine M, Burner E, Arora S, Inaba K, Demetriades D, Yersin B. Leadership and Teamwork in Trauma and Resuscitation. West J Emerg Med. 2016 Sep;17(5):549-56.
    5. Jacobson KR, Arora S, Walsh KB, Lora M, Merjavy S, Livermore S, Menchine M. High Feasibility of Empiric HIV Treatment for Patients With Suspected Acute HIV in an Emergency Department. J Acquir Immune Defic Syndr. 2016 Jul 1;72(3):242-5.
    6. Gaudette, E., Pauley, G.C., and Zissimopoulos, J.M., 2016. Long-term Individual and Population Consequences of Early-life Access to Health Insurance. University of Michigan Retirement Research Center (MRRC) Working Paper WP 2016-355. Available at SSRN:
    7. Agus, D., Gaudette, E., Messali, A., and Goldman, D.P., 2016. “The Long-Term Benefits of Increased Aspirin Use by At-Risk Americans Aged 50 and older,” PLoS ONE, 11(11): e0166103.
    8. Goldman, D.P., Gaudette, E., Cheng, W.-H., 2016. “Competing Risks: The Economics of Investing in Sickness rather than Health”, American Journal of Preventive Medicine, 50(5, Supplement 1): p. S45-S50.
    9. Lam CN, Arora S, Menchine M. Increased 30-Day Emergency Department Revisits Among Homeless Patients with Mental Health Conditions. West J Emerg Med. 2016 Sep;17(5):607-12.
    10. Levine M, Flores J, Seabury SA, Sanko S, Eckstein M. Impact of the Use of Regional Poison Control Centers in an Urban Ems Dispatch System. J Med Toxicol. Epub 2016 Oct 7.
    11. Ly DP, Seabury SA, Jena AB. Differences in Incomes of Physicians in the United States by Race and Sex: Observational Study. Bmj. 2016;353:i2923.
    12. MacEwan JP, Kamat SA, Duffy RA, Seabury S, Chou JW, Legacy SN, Hartry A, Eramo A, Karson C. Hospital Readmission Rates among Patients with Schizophrenia Treated with Long-Acting Injectables or Oral Antipsychotics. Psychiatr Serv. 2016 Jul 15:appips201500455.
    13. Menchine M, Zhou M, Lotfipour S, Chakravarthy B. Moving Beyond Screening: How Emergency Departments Can Help Extinguish the HIV/AIDS Epidemic. West J Emerg Med. 2016 Mar;17(2):135-8.
    14. Schwartz AL, Pesa J, Doshi D, Fastenau J, Seabury SA, Roberts ET, Grabowski DC. Medicaid Managed Care Penetration and Drug Utilization for Patients with Serious Mental Illness. Am J Manag Care. 2016 May;22(5):346-53.
    15. Seabury SA. Letter. J Manag Care Spec Pharm. 2016 Nov;22(11):1222.
    16. Shafrin J, Ganguli A, Gonzalez YS, Shim JJ, Seabury SA. Geographic Variation in the Quality and Cost of Care for Patients with Rheumatoid Arthritis. J Manag Care Spec Pharm. 2016 Dec;22(12):1472-81.
    17. Terp S, Seabury SA, Arora S, Eads A, Lam CN, Menchine M. Enforcement of the Emergency Medical Treatment and Labor Act, 2005 to 2014. Ann Emerg Med. Epub 2016 Aug 1.
    18. Thornton Snider J, Seabury S, Lopez J, McKenzie S, Goldman DP. Impact of Type 2 Diabetes Medication Cost Sharing on Patient Outcomes and Health Plan Costs. Am J Manag Care. 2016 Jun;22(6):433-40.
    19. Undurraga Perl VJ, Leroux B, Cook MR, Watson J, Fair K, Martin DT, Kerby JD, Williams C, Inaba K, Wade CE, Cotton BA, Del Junco DJ, Fox EE, Scalea TM, Tilley BC, Holcomb JB, Schreiber MA; PROPPR Study Group. Damage-control resuscitation and emergency laparotomy: Findings from the PROPPR study. J Trauma Acute Care Surg. 2016 Apr;80(4):568-74; discussion 574-5.
    20. Wagner JG, Schneberk T, Zobrist M, Hern HG, Jordan J, Boysen-Osborn M, Menchine M. What Predicts Performance? A Multicenter Study Examining the Association Between Resident Performance, Rank List Position, and United States Medical Licensing Examination Step 1 Scores. J Emerg Med. 2016 Dec 9. pii: S0736-4679(16)30996-9.


    1. Gaudette, E., Tysinger, B., Cassil, A., Goldman, D.P., 2015. “Health and Health Care of Medicare Beneficiaries in 2030”, Forum for Health Policy and Economics, 18(2), p. 75-96.
    2. Gaudette, E., Goldman, D.P., Messali, A., Sood, N., 2015. “Do Statins Reduce the Health and Health Care Costs of Obesity?”, PharmacoEconomics, 33(7), p. 723-734.
    3. Gaudette, E., 2014. Health Care Demand and Impact of Policies in a Congested Public System. University of Southern California CESR-Schaeffer Working Paper No. 2014-005. Available at SSRN:
    4. Romley, J, Axeen, S, Lakdawalla, D, Chernew, M, Bhattacharya, J, Goldman, D. “The Relationship between Commercial Health Care Prices and Medicare Spending,” Health Services Research 50 (3), June 2015: 883-896.
    5. Chernew, M, Goldman, D, Axeen S. “How Much Savings Can We Wring from Medicare?” NEJM 2011: 365.
    6. Jena AB, Schoemaker L, Bhattacharya J, Seabury SA. Physician Spending and Subsequent Risk of Malpractice Claims: Observational Study. Bmj. 2015;351:h5516.
    7. Jena AB, Schoemaker L, Bhattacharya J, Seabury SA. Authors’ Reply to Barbieri and Kovarik, Mariani, and Waxman and Kanzaria. Bmj. 2015;351:h6774.