天美传媒

Emilia Simeonova, PhD (Economics from Columbia University in 2008) joined Johns Hopkins Carey Business School in 2013 from Tufts University. Between 2011-2012 she was a research fellow at the Center for Health and Wellbeing at Princeton University. Emilia鈥檚 research interests in the economics of health care delivery, patient adherence to therapy and the interaction between physicians and patients, racial disparities in health outcomes, the long-term effects of shocks to children's health and intergenerational transmission of health.  Her research has been funded by the National Institutes of Health, the National Science Foundation, the Swedish Research Council and the Danish Academy of Sciences. 

Dr. David Kass has published articles in corporate finance, industrial organization, and health economics. He currently teaches Advanced Financial Management and Business Finance, and is the Faculty Champion for the Sophomore Finance Fellows. Prior to joining the faculty of the Smith School in 2004, he held senior positions with the Federal Government (Federal Trade Commission, General Accounting Office, Department of Defense, and the Bureau of Economic Analysis). Dr. Kass has recently appeared on Bloomberg TV, CNBC, PBS Nightly Business Report, Maryland Public Television, Business News Network TV (Canada), FOX TV, Bloomberg Radio, Wharton Business Radio, KCBS Radio, American Public Media's Marketplace Radio, and WYPR Radio (Baltimore), and has been quoted on numerous occasions by The Wall Street Journal, Bloomberg News, The New York Times and The Washington Post, where he has primarily discussed Warren Buffett, Berkshire Hathaway, the economy, and the stock market. He has also launched a Smith School 鈥淲arren Buffett鈥� blog. Dr. Kass has accompanied MBA students on trips to Omaha for private meetings with Warren Buffett, and Finance Fellows to Berkshire Hathaway鈥檚 annual meetings. He was an officer of the Harvard Business School Club of Washington, DC, and is a member of the investment and budget committees of a local nonprofit organization. Dr. Kass received a Smith School "Top 15% Teaching Award" for 2009-2010, a "Distinguished Teaching Award (Top 10%)" for 2014-2015, and the prestigious "Krowe Teaching Award鈥� for 2015 and 2019.

Kosali Simon is a Distinguished Professor and Herman B Wells Endowed Professor in the O'Neill School of Public and Environmental Affairs and associate vice provost for health sciences. She is a nationally known health economist who specializes in applying economic analysis in the context of health insurance and health care policy. Her research focuses on the impact of health insurance reform on health care and labor market outcomes, and on the causes and consequences of the opioid crisis.

David Neumark is an American economist and a Chancellor's Professor of Economics at the University of California, Irvine, where he also directs the Economic Self-Sufficiency Policy Research Institute.

Neumark graduated with a B.A. in economics in 1982 from the University of Pennsylvania. He graduated Phi Beta Kappa, Summa Cum Laude, with Honors. He went on to complete his M.A. in 1985 and Ph.D. in 1987 in economics from Harvard University. His fields were labor economics and econometrics. His dissertation was entitled Male-Female Differentials in the Labor Force: Measurement, Causes and Probes, and published in parts in the Journal of Human Resources.

From 1989 to 1994, Neumark was an Assistant Professor of Economics at the University of Pennsylvania. He became a professor at Michigan State University in 1994 and remained at MSU until 2004. Since 2005, he is a Professor of Economics at the University of California, Irvine. He is also a research associate at the National Bureau of Economic Research and the Institute for the Study of Labor (IZA).

Neumark's research interests include minimum wages and living wages, affirmative action, sex differences in labor markets, the economics of aging, and school-to-work programs, and has also done work in demography, health economics, development, industrial organization, and finance. His work has been published in economics journals like the American Economic Review, the Quarterly Journal of Economics, the Journal of Political Economy, the Journal of Labor Economics, the Journal of Human Resources. He is currently the editor of the IZA Journal of Labor Policy and a co-editor of the Journal of Urban Economics.

Professor Kajal Lahiri鈥檚 interests include Econometrics, Forecasting, and Economics of Health. They have been supported by National Science Foundation, the World Bank, NY State Division of BudgSet, International Monetary Fund, Social Security Administration, US Department of Transportation, and the National Institutes of Health.

Lahiri teaches economic statistics, forecasting, econometrics, and applied econometrics.

Fields of Interest: Econometrics, Health Economics

Karen Hofman is Research Professor and founding Director of the SAMRC Centre for Health Economics and Decision Science/ PRICELESS SA at the University of Witwatersrand. A qualified paediatrician, she was on faculty at Johns Hopkins and served as Policy Director at the US NIH Fogarty Center. For the past 15 years, Karen has led policy research to evaluate interventions both inside the health system and in other sectors that provide the biggest return on investment for health.
She is widely published in global health with more than 150 peer reviewed publications and has received the Wits Vice Chancellor’s Social Impact Research Award in 2020 and the Science-for-Society Gold Medal from the Academy of Science of South Africa in 2022.

Miller’s research focuses on a broad range of economic issues that the healthcare industry faces today. Miller serves as a co-editor for the Journal of Public Economics, and an associate editor for the Journal of Health Economics and the American Journal of Health Economics. She teaches business economics and public policy topics. She holds a BS from Tulane University and a PhD from the University of Illinois.

Eric Christensen, Ph.D., is the Director of Economic and Health Services Research for the Harvey L. Neiman Health Policy Institute (HPI). He has over 20 years of experience as a health economist. Prior to working at the Neiman HPI, he led an interdisciplinary research team at the Center for Naval Analyses conducting research for various government agencies, served as the health economist for Children’s Minnesota hospital system, taught health economics at the University of Minnesota, and engaged in private consulting.
Dr. Christensen’s recent research has focused on the financial viability of the No Surprises Act for clinicians when resolving payment disputes for out-of-network claims, Medicare reimbursement trends, economic drivers of health disparities and the role of reimbursement in disparities, the role of treatment and imaging in cost growth in stroke care, and the association of non-physician practitioners in imaging ordering and interpretation patterns. His research and consulting have covered an array of health care delivery and policy questions from the standpoints of cost of imaging, non-physician practitioners and imaging, accountable care organizations, population health, cost-effectiveness, medical homes, interventions, infrastructure, financial performance under various reimbursement models, demonstrating the value of specific clinical approaches, determining the return on investment, and demonstrating the economic impact of health systems on the local economy.
Dr. Christensen has worked extensively with internal and external stakeholders. In addition to professional conferences, he has presented research and analytic findings to senior government leaders and corporate executives. This includes testimony before U.S. Senate and U.S. House committees, the congressionally appointed Veterans’ Disability Benefits Commission, and the DOD Task Force on the Future of Military Health Care.
Dr. Christensen received his PhD in economics from the University of Illinois. He has a master’s degree in economics from Colorado State University and a bachelor’s degree in business management (finance) from Brigham Young University.

Bill’s day-to-day work is focused on finding new and exciting research opportunities with LEO’s partners. Before founding LEO, he was appointed as the Keough-Hesburgh Professor of Economics at the University of Notre Dame in 2007 and served as an editor of the Journal of Human Resources from 2007-2012. Bill held a 6-year term as the Chair of the Economics Department at Notre Dame (2014-2020), and he’s currently a Research Associate at the National Bureau of Economic Research. He also serves as an Affiliated Professor of the Abdul Latif Jameel Poverty Action Lab. He received his BA in Economics and Math from Wake Forest University and his MA and PhD in Economics from Duke University. Bill specializes in health economics research, the economics of education, and public finance.

Current Positions


Assistant Professor, Finance


Hentges Fellow in Finance, Finance




Research Interests


Insurance Economics


Household Finance


Public Policy Analysis


Health Economics




Selected Awards & Honors


Les B. Strickler Innovation in Instruction Award - American Risk and Insurance Association, 2024


National Association of Insurance Commissioners Research Fellowship, 2023 - 2024


Excellence in Reviewing Award - Journal of Risk and Insurance, 2023


Excellence in Reviewing Award - Journal of Risk and Insurance, 2022