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Xiaoxi Zhao Ph.D.

Lead Research Scientist
xiaoxi_zhao@brown.edu

Biography

Xiaoxi Zhao is a Lead Research Scientist at the Brown University School of Public Health. Her research focuses on vertical integration and ownership structure in health care markets, and how markets respond to major policy changes including Medicare payment reforms. Her work has been published in journals including the American Economic Review, American Economic Journal: Economic Policy, the Journal of Public Economics, and Health Affairs. She received her PhD in economics from Boston University.

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News from SPH

When UnitedHealth bought doctor practices, Medicare Advantage spending rose but care stayed the same, study finds

April 16, 2026
The findings of the working paper offer a behind-the-scenes look at what can happen as major health insurers expand into owning and operating physician practices.
Read Article
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Xiaoxi Zhao Ph.D.