Get to Know Us
Meet Our Team.
principal
Marric G. Buessing, PhD
Dr. Buessing has a wide range of consulting and analytical experience in the healthcare industry. Her areas of expertise include analyses of economic damages, cost-effectiveness models, and systematic literature reviews. She also has over 10 years of experience working with various healthcare data sources including claims data, clinical trial data, and patient/physician/payer surveys. Dr. Buessing’s academic research has focused on the intersection of regulatory policy and health and safety outcomes. Prior to joining Medicus, Dr. Buessing was a Manager at Analysis Group where she supported academic experts on matters related to healthcare litigation. She received both her bachelor’s degree in Economics and International Relations and a Ph.D. in Economics from Boston University.
principal
Elizabeth Chertavian, MBA
Ms. Chertavian has worked within the pharmaceutical and biotech industries to support commercial and market access activities for a wide variety of products. Her areas of expertise encompass health economics and outcomes research strategy and economic decision modeling, including HTA engagements, cost-effectiveness models, budget impact analyses, natural-history models, and real-world evidence generation. Prior to joining Medicus, she spent 7 years at Analysis Group, where her work specifically focused on litigations involving pricing and contract disputes, false claims act investigations, and controlled substance monitoring, in which she supported academic experts in their analyses of claims and prescription drug data. Ms. Chertavian received her bachelor’s degree in Mathematics and French from Bowdoin College and her master’s degree in business administration from Harvard Business School.
Director
Samantha Clark, PhD
Dr. Clark specializes in the use of advanced statistical and econometric methods to generate actionable evidence that can inform health policy and guide business decisions. She has extensive experience applying these methods in the context of causal inference, machine learning-based risk prediction models, and complex longitudinal data analysis in the oncology setting. Prior to joining Medicus, she worked as health economics faculty focused on decision-analytic modeling in the infectious disease space at the Johns Hopkins Bloomberg School of Public Health (JHSPH). She was the recipient of a Developing Data-Driven Cancer Researchers (3DCR) Training (T32) Grant Award from the National Institutes of Health, and her work has been featured in Health Affairs, Vaccine, and the Lancet. Dr. Clark received a bachelor’s degree in economics from St. Mary’s College of Maryland, a master’s degree in health economics from JHSPH, and a PhD in Health Economics and Outcomes Research from the University of Washington.
principal
Matthew R. Davis, MA
Mr. Davis has analytical experience in health outcomes research and pharmaceutical litigation and has conducted academic studies on issues of health policy reform. He specializes in assessment of the value and effectiveness of novel healthcare interventions and treatment strategies from the patient, payer, and societal perspective. He has deep skills in applying a wide array of econometric methods to databases of all types and using a diversity of modeling and simulation techniques to project expected outcomes. Mr. Davis received a bachelor’s degree in Economics and Mathematics from Williams College and a master’s degree in Economics from Boston College, specializing in Econometrics and Labor Economics.
principal/co-founder
Andrew J. Epstein, PhD, MPP
Dr. Epstein (co-founder) has three decades of experience conducting empirical health economics and health services research studies. He combines novel data, careful application of analytic methods and an appreciation for the institutional context to answer important questions across a range of clinical settings. This work has resulted in over 100 publications in top peer-reviewed journals across medicine, outcomes research, health services research, and health economics. Previously, Dr. Epstein was on faculty at the University of Pennsylvania Perelman School of Medicine and the Yale School of Public Health. He received a bachelor’s degree in Computer Science from Amherst College, a master’s degree in Health Policy from Georgetown University, and a Ph.D. in Applied Economics and Managerial Science from the University of Pennsylvania Wharton School of Business.
principal
John Jarvis, MBA
Mr. Jarvis provides strategic value and access consulting to clients in the life sciences industry. His areas of expertise include the development of value frameworks, strategic real-world evidence planning, and value-based pricing assessments. Mr. Jarvis conducts research with US and ex-US stakeholders, including in-depth interviews, quantitative surveys, and the design and moderation of advisory boards. His advisory board experience includes gathering strategic input from payers, providers, and policy-makers, as well as engaging and aligning cross-functional client teams. He has also led sophisticated technical analyses in the fields of health economic modeling and real-world data analysis which have been published in peer-reviewed journals and presented at international clinical and health economics conferences. He received his bachelor’s degree in Economics and Mathematics from Wesleyan University and his master’s degree in business administration from the MIT Sloan School of Management.
CEO/co-founder
Scott J. Johnson, PhD, MHA
Dr. Johnson (CEO, co-founder) is a health economist with over two decades of experience in econometric analyses of large databases, discrete choice analyses and designs of prospective experiments, modeling, pricing, and policy analyses. Prior to joining Medicus Economics, he co-founded and managed a firm specializing in cost-effectiveness analyses and was a Manager at Analysis Group. Dr. Johnson earned his bachelor’s degree in History at the University of Virginia, his master’s degree in health administration from the Medical College of Virginia, and a Ph.D. in Applied Economics and Managerial Science from the University of Pennsylvania Wharton School of Business.
Principal
Alice Kate Cummings Joyner, MS
Ms. Joyner has worked as a health economics consultant and a hospital researcher focused on increasing value in care for more than a decade. Her areas of expertise include analyses of claims and electronic health record data, cost-effectiveness analyses and economic modeling, and discrete event simulation, spanning a wide range of disease and treatment areas. Her work has been published in various journals, including Alzheimer’s & Dementia, Diabetes Care, and BMC Geriatrics. She received her bachelor’s degree in Mathematics and Economics from Wellesley College, and a Master of Science in Management Science and Engineering with a focus on Health Systems Modeling from Stanford University.
Director
Zachary Marcum, PharmD, PhD, MS
Dr. Marcum is a Director at Medicus Economics specializing in pharmacoepidemiologic methods. He has extensive experience designing and implementing descriptive and comparative real-world data analyses on topics including medication adherence, medication effectiveness, and medication safety in the cardiovascular, infectious diseases, and neurological settings. He has a unique mix of experience spanning both the academic and healthcare technology start-up sectors. Prior to joining Medicus, he worked as a Director at Aetion as well as a tenured faculty member at the University of Washington School of Pharmacy. He was the first pharmacist to be awarded the Beeson Emerging Leaders Career Development Award from the National Institute on Aging. He has published 150+ peer-reviewed manuscripts in leading medical journals, including JAMA and JAMA Internal Medicine. Dr. Marcum received a PharmD from Butler University, completed a PGY1 Pharmacy Practice Residency at the Roudebush VA Medical Center (Indianapolis, IN), a Master of Science degree in Clinical Research as well as a PhD in Clinical & Translational Science from the University of Pittsburgh.
Principal
Thomas O'Connell, MA
Mr. O’Connell has provided economic consulting services addressing commercial and market access strategies to various large pharmaceutical corporations. He specializes in optimization of market-access/reimbursement strategy and on economic evaluations for health technology assessment. His models have been used by pharmaceutical corporations in establishing strategies concerning international reference pricing, foreign market access and reimbursement, and optimal launch-price and discounting strategies in the US. He has also conducted cost-effectiveness and budget-impact analyses and/or authored technical reports for regulatory submissions in over 15 markets and advised clients through review by the Institute for Clinical and Economic Review in the US. Mr. O’Connell has a bachelor’s degree in Economics from Harvard University and a master’s degree in Economics and Econometrics from the University of California, Santa Barbara.
principal
Hélène Parisé, MA
Ms. Parisé has over 15 years of experience providing economic consulting services addressing commercial and market access strategies that span a wide range of disease and treatment areas. She specializes in cost-effectiveness and budget impact modeling, HTA submissions in various countries, clinical trial data analyses, and assessment of disease burden using large claims databases. She has conducted research on a broad range of diseases and conditions including oncology, hepatitis C, Crohn’s disease, postpartum depression, hypertension, epilepsy, multiple sclerosis, diabetes, schizophrenia, and anemia. Her research has been published in numerous peer-reviewed journals. Ms. Parisé earned her bachelor’s and master’s degrees in Economics at Laval University.
Principal
Warren Stevens, PhD
Dr. Stevens has been conducting empirical health economics and health policy research studies for 20 years in diverse settings covering 4 continents. His research experience includes health policy and health systems research, cost-effectiveness modeling, development of new methodologies in value assessment, and health outcome measurement. He also has broad research interests within the field of health economics, encompassing heterogeneity of effect in reporting of cost-effectiveness, estimation and application of time-varying cost-effectiveness, and the evolution of health utility measures to better reflect patients’ preferences. His research has been published in leading medical, health services research, and economics journals, including the Lancet, the British Medical Journal, Health Affairs, Health Services Research, Health Economics, the American Journal of Managed Care, and PLOS Medicine. He received a bachelor’s degree in Economics and Philosophy from Royal Holloway College, a master’s degree in Health Services Research, and a Ph.D. in Health Economics from the London School of Hygiene and Tropical Medicine.
Principal
Si-Tien (Mary) Wang, MS
Ms. Wang has conducted and directed a wide range of investigations in health economics and outcomes research, including comparative effectiveness, direct and indirect resource utilization and costs, work loss, quality of life, treatment pattern, disease prevalence, and adverse events across a range of therapeutic areas. Her research has involved data from clinical trials, medical records review, automated health insurance claims, systematic literature review, and patient/physician/payer surveys. Ms. Wang received a bachelor’s degree in Economics and Neuroscience from Wellesley College and a master’s degree in Health Policy and Management from Harvard School of Public Health.
Principal
Eric Zuk, MBA
Mr. Zuk has in-depth experience providing analytics in the healthcare industry. He has worked with pharmaceutical manufacturers, distributors, and retail pharmacy chains to assess their analytical needs, develop models, and implement solutions. Prior to joining Medicus, he spent 7 years at Analysis Group, conducting empirical and quantitative analyses for entities across the pharmaceutical supply chain, most notably through the development of controlled substance monitoring algorithms and claims-based analysis in support of academic experts. Mr. Zuk received bachelor’s degrees from MIT in Mathematics with Computer Science and Management Science, as well as a master’s degree in business administration from the MIT Sloan School of Management.