Stanford University
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C. Ryan Perkins
Curator for South Asian Studies and Islamic Studies, Humanities Resource Group
Current Role at StanfordAs the Curator for South Asian and Islamic Studies I am responsible for building the library's collection of materials from and about South Asia and the Islamic world in English, European languages, and languages of the Middle East, Central Asia, and South Asia. This involves building and sustaining a network of antiquarian dealers, book vendors, scholars, publishers, and libraries in South Asia, Central Asia, and the Middle East. Apart from responding to faculty teaching needs I work in collaboration with the South Asia Center, the Abbasi Program in Islamic Studies, and their affiliates to provide research assistance to faculty, students, and other library users. I also oversee the Bahai collection.
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Mark Perlroth, MD
Member, Cardiovascular Institute
Current Research and Scholarly Interests1. Adult Congenital Heart Disease
2. Cardiac Transplantation
3. General Cardiology
4. Porphyrias -
Suzann Pershing, MD
Professor of Ophthalmology
On Partial Leave from 2026-07-27 To 2026-09-04BioDr. Pershing is on the ophthalmology faculty at Stanford University School of Medicine, with an academic career blending clinical practice, teaching, research, and administration. She serves as Chief of Ophthalmology and Eye Care Services for the VA Palo Alto Health Care System and as Vice Chair for Education in the Stanford Department of Ophthalmology, after five years as Program Director for the ophthalmology residency.
As an educator she seeks to bring a "precision" approach to graduate medical education, incorporating innovation and research rigor. She is committed to program development and excited to innovate and implement novel approaches to ophthalmology education. Specific areas of interest include competency-based education, career pathways and career development, and leadership development, with programmatic initiatives such as Stanford Ophthalmology's 4-year research track residency program (SOAR), opportunities for resident elective scholarly activity, and efforts to develop a valuable internship program for incoming ophthalmology residents at Stanford. Dr. Pershing's active research includes efforts to enhance fair and holistic residency selection, using AI semi-supervised models to augment the application review process, and predictive modeling to optimize cataract surgery case selection and scheduling.
Her broader research interests focus on utilization of big data, AI and biomedical informatics techniques, predictive modeling, and evidence-based medicine to study clinical associations and outcomes, health care utilization, disease progression, and cost-effectiveness of ophthalmic treatment, as well as a special interest in the relationship between visual impairment and cognitive impairment. Dr. Pershing is active in big data initiatives and analysis, including collaborative projects at Stanford and serving as site PI for the American Academy of Ophthalmology (AAO) IRIS Registry analytic group at Stanford, as well as helping to lead efforts for Stanford to submit data and participate in the Sight Outcomes Research Collaborative (SOURCE) data repository. She also serves on the American Board of Medical Specialties Database and Information Technology Advisory Committee (DITAC), and previously on the AAO Medical Information Technology Committee and AAO Committee on Aging. Through this and her other work, she is engaged in efforts to use diverse data sources to facilitate improved quality of care, continuing certification, and practice and outcomes assessments. Dr. Pershing is also involved in health policy, including helping to develop CMS episode-based cost measures for MIPS, and she is interested in health care innovation—technology, quality, and delivery systems.
Dr. Pershing also serves as faculty advisor for the Alpha Omega Alpha medical honor society Stanford association, with focus on resident initiatives, and mentors both medical students and undergraduate students. -
Nathaniel Persily
James B. McClatchy Professor, Senior Fellow at the Freeman Spogli Institute for International Studies and Professor, by courtesy, of Communication and of Political Science
BioNate Persily is the James B. McClatchy Professor of Law at Stanford Law School and the Co-Director of the Stanford Law AI Initiative. He also holds appointments in the departments of Political Science, Communication, and the Freeman Spogli Institute of International Studies. Professor Persily’s work focuses on two distinct areas: the Law of Democracy and Governance of Technology. He is coauthor with Samuel Issacharoff, Pamela Karlan, Richard Pildes and Franita Tolson of the casebook, The Law of Democracy (Foundation Press, 6th ed., 2020), which addresses issues such as voting rights, political party regulation, campaign finance, redistricting, and election administration. He has served as a special master or court-appointed expert to craft congressional or legislative districting plans for Georgia, Maryland, Connecticut, New Hampshire, New York, North Carolina, and Pennsylvania. He also served as the nonpartisan Senior Research Director for the Presidential Commission on Election Administration. His current work, for which he has been honored as a Guggenheim Fellow, Andrew Carnegie Fellow, and a Fellow at the Center for Advanced Study in the Behavioral Sciences, examines the governance of technology and technology’s impact on democracy. He is coeditor, with Joshua Tucker, of Social Media and Democracy: The State of the Field and Prospects for Reform (Cambridge Press, 2020), and Artificial Intelligence, Politics, and Political Science (Cambridge Press, 2026). He is also co-editor of the Digitalist Papers: Artificial Intelligence and Democracy in America (2024) with Erik Brynjolfsson, Alex Pentland and Condoleeza Rice. Professor Persily cochairs the Presidential Task Force on Artificial Intelligence of the American Political Science Association. He is a member of the American Academy of Arts and Sciences. He received a B.A. and M.A. in political science from Yale (1992); a J.D. from Stanford (1998) where he was President of the Stanford Law Review, and a Ph.D. in political science from U.C. Berkeley in 2002.
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Petra Persson
Associate Professor of Economics, Senior Fellow at the Stanford Institute for Economic Policy Research and Associate Professor, by courtesy, of Health Policy
BioPetra Persson is Associate Professor of Economics at Stanford University, where she also serves as the Nina C. Crocker Faculty Scholar in the School of Humanities and Sciences and holds a courtesy appointment as Associate Professor of Health Policy. She is a Faculty Research Associate at the National Bureau of Economic Research, a Senior Fellow at the Stanford Institute for Economic Policy Research, and a Research Affiliate at the Centre for Economic Policy Research.
Professor Persson earned her PhD in Economics from Columbia University in 2013, her MSc in Economics from Stockholm School of Economics in 2006, and her BA in Political Science and Mathematics from Stockholm University in 2005. Prior to joining the Stanford faculty, she was a Postdoctoral Fellow at the Stanford Institute for Economic Policy Research (2013-2014) and a Dissertation Fellow at the Harvard Kennedy School Women and Public Policy Program (2012-2013).
Persson's research lies at the intersection of family economics, health economics, and public finance, spanning topics including health disparities, maternal and child well-being, family structure and behavior, fertility policy, and social insurance design. She is the recipient of the National Science Foundation CAREER Award and has published articles in leading peer-reviewed journals, including the American Economic Review, Journal of Political Economy, American Economic Review: Insights, American Economic Journal: Applied Economics, American Economic Journal: Economic Policy, and British Medical Journal. -
Michael Peskin
Professor of Particle Physics and Astrophysics, Emeritus
BioI am a theoretical physicist interested in elementary particles and the fundamental interactions. My main research interests are:
* consequences of the "Standard Model of particle physics"
* precision study of the heaviest known elementary particles - the W and Z bosons, the top quark, and the Higgs boson - to search for clues to new fundamental interactions beyond the Standard Model
* models of such new interactions, especially models with composite or strongly interacting Higgs bosons
* models for the particle that composes the dark matter of the universe
I am the author of a leading theoretical textbook in this area, "An Introduction to Quantum Field Theory", with Daniel Schroeder. Recently, I have written another textbook that emphasizes our experimental knowledge, "Concepts of Elementary Particle Physics".
For further information about my research activities, interests, Stanford courses, and related subjects, please see my web page: https://s3df.slac.stanford.edu/people/mpeskin/ -
Jeffrey Petersen
Professor of Medicine (Nephrology) at the Stanford University Medical Center, Emeritus
Current Research and Scholarly InterestsHigh flux dialysis in in-vivo and in-vitro clearances, of small and middle molecular weight solutes; computerized capture, of interdialysis hemodynamics; biocompatibility of biomembranes;, dialysis-related amyloidosis
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Claudia Katharina Petritsch
Associate Professor (Research) of Neurosurgery
Sr Res Scientist-Basic Life, Adult NeurologyCurrent Research and Scholarly InterestsThe Petritsch lab broadly investigates underlying causes for the intra-tumoral heterogeneity and immune suppression in brain tumors from a neuro-developmental perspective. Defective cell fate decisions fuel the intra-humoral heterogeneity and plasticity in human brain tumors and may contribute to immune suppression. We use patient-derived models as avatars to study how brain cells control the fate of their progeny, whereby we unravel novel points of vulnerabilities in brain tumor cells.
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Vahe Petrosian
Professor of Physics and of Applied Physics
BioHow do things evolve in the universe? How are particles accelerated in the universe?
Professor Petrosian’s research covers many topics in the broad area of theoretical astrophysics and cosmology, with a strong focus on high-energy astrophysical processes.
Cosmological studies deal with global properties of the universe, where the main focus is the understanding of the evolution of the universe at high redshifts, through studies of the evolutions of population of sources such as galaxies and quasars or active galactic nuclei, gamma-ray bursts, using new statistical techniques developed in collaboration with Prof. B. Efron of the Department of Statistics. Another area of research is the use of gravitational lensing in measuring mass in the universe.
High-energy astrophysics research involves interpretation of non-thermal astronomical sources where particles are accelerated to very high energies and emit various kinds of radiation. These processes occur on many scales and in all sorts of objects: in the magnetosphere of planets, in the interplanetary space, during solar and stellar flares, in the accretion disks and jets around stellar-size and super-massive black holes, at centers of galaxies, in gamma-ray bursts, in supernovae, and in the intra-cluster medium of clusters of galaxies. Plasma physics processes common in all these sources for acceleration of particles and their radiative signature is the main focus of the research here. -
Edwin Petrossian
Clinical Professor, Cardiothoracic Surgery
Current Research and Scholarly InterestsDr. Petrossian has expertise in complex pediatric and congenital cardiovascular surgical repairs. He has published several journal articles and book chapters with an emphasis on the extracardiac conduit Fontan operation.
