Research

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Nathan Jefferson

Senior Associate, Research
Nathan Jefferson is a senior associate on the research team at the Milken Institute. In this role, he contributes to the Institute’s research on regional economics and international finance.
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Abigail Humphreys

Senior Associate, Research
Abigail Humphreys, PhD, is a senior associate of the Milken Institute’s Research team where she applies her expertise to projects associated with regional economic opportunity and well-being.
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William Lee

Chief Economist
William (Bill) Lee is chief economist at the Milken Institute. He leads the Institute’s effort to develop collaborative policies to improve access to and the functioning of capital markets, strengthen financial stability and the soundness of financial institutions, and foster global macroeconomic, financial, and regulatory conditions to bolster job creation.
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Brock Smith

Associate Director, Research
Brock Smith, PhD, is an associate director on the research team at the Milken Institute. His research has focused on environmental economics and natural resource economics, particularly the economic and social effects of natural resource booms.
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Leilani Jimenez

Senior Associate, Research
Leilani Jimenez is a senior associate with the Research Department at the Milken Institute. In this role, she supports the department's research portfolio in health economics, regional economics, and international finance.
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Bumyang Kim

Associate Director, Health Economics
Bumyang Kim, PhD, is an associate director of health economics research in the Health pillar of the Milken Institute, where he leads data-driven, evidence-based research to advance health equity and reduce disparities in health care access and delivery.
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Katherine Sacks

Associate Director, Health Economics
Katherine Sacks, PhD, is an associate director in research at Milken Institute Health. Her research concerns health equity, health disparities, and the social determinants of health, focusing particularly on adverse maternal birth outcomes, as well as the effects of the social safety net on measures of population health.
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Maggie Switek, PhD

Senior Director, Research
Maggie Switek, PhD, is a senior director on the research team at the Milken Institute. She heads all projects related to economic growth and opportunities across regions and communities in the US and abroad.
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Andrew Friedson

Director, Health Economics
Andrew Friedson, PhD, is the head of research for the Milken Institute Health. He is an economist with expertise in health care and related sectors.
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