Board of Directors
The SSRC is governed by a board of directors made up of social scientists and practitioners from a broad range of disciplines and institutions. The board elects the SSRC president and regularly reviews the Council’s intellectual program. An executive committee of the board oversees financial and operational aspects.
List of Board Members
Professor of Sociology and International & Area Studies
Founder and President
Data & Society
John Seely Brown
Advisor to the Provost
University of Southern California
Deloitte’s Center for the Edge
Teresa P. R. Caldeira
Professor of City and Regional Planning
College of Environmental Design
University of California, Berkeley
Sandra Dawson (Chair, Executive Committee)
KPMG Professor Emeritus of Management Studies
University of Cambridge
Isabelle de Lamberterie
Director of Research Emerita
Centre National de la Recherche Scientifique
Mamadou Diouf (Chair, Board of Directors)
Leitner Family Professor of African Studies
Director of the Institute of African Studies
General Partner and Cofounder
Professor of Economics
William H. Janeway
Naomi R. Lamoreaux
Stanley B. Resor Professor of Economics and History
Chair, Department of History
National Bureau of Economic Research
Thomas A. Langford University Professor
Professor of Political Science and Public Policy
Director, Center for Advanced Study in the Behavioral Sciences
Professor of Political Science
Jere L. Bacharach Professor Emerita of International Studies
University of Washington
Sara Miller McCune
Founder and Executive Chairman
Helen V. Milner
Director, Niehaus Center for Globalization and Governance
B. C. Forbes Professor of Politics and International Affairs
Peter Nager (Chair, Investment Committee)
Senior Managing Director
Egret Capital Partners
Alondra Nelson (Ex Officio)
Walter W. Powell
Professor of Education and (by courtesy) Sociology, Organizational Behavior, Management Science and Engineering, Communication, and Public Policy
Codirector, Center on Philanthropy and Civil Society
José A. Scheinkman
Edwin W. Rickert Professor of Economics
Barbara Stallings (Chair, Audit Committee)
Professor of International Studies [Research]
Audit Committee Member
Julia Adams is professor of sociology and international and area studies and master of Calhoun College at Yale University. She teaches and conducts research in the areas of state development, social theory and public knowledge, gender/family, early modern European politics, and colonialism and empire. Her monograph The Familial State: Ruling Families and Merchant Capitalism in Early Modern Europe (Cornell, 2005) won the Gaddis Smith International Book Prize. She coedited Patrimonial Capitalism and Empire (Emerald, 2015); “Patrimonial Power in the Modern World,” a 2011 special issue of the Annals of the American Academy of Political and Social Science; and Remaking Modernity: Politics, History, and Sociology (Duke, 2005). Her work has twice won the Barrington Moore Jr. Award for best article, given by the American Sociological Association (ASA) section in Comparative and Historical Sociology. In 2013, Adams was awarded a National Science Foundation grant for collaborative research on Wikipedia and the democratization of academic knowledge. Adams graduated from Reed College and did her graduate work at the University of Wisconsin–Madison. She served as 2008–2009 president of the Social Science History Association and 2012–2013 chair of the ASA Global and Transnational section. At Yale, she has chaired the department of sociology and the International Affairs Council and directed the Division of the Social Sciences. She has also served as deputy provost for social sciences and faculty development and diversity. Adams currently codirects Yale’s Center for Historical Enquiry and the Social Sciences (CHESS).
danah boyd is the founder and president of Data & Society, a research institute focused on understanding the role of data-driven technologies in society. She is also a principal researcher at Microsoft Research and a visiting professor at New York University. Her research is focused on addressing social and cultural inequities by understanding the relationship between technology and society. Her most recent books—It’s Complicated: The Social Lives of Networked Teens and Participatory Culture in a Networked Age—examine the intersection of everyday practices and social media. She is a 2011 Young Global Leader of the World Economic Forum, a member of the Council on Foreign Relations, a director of Crisis Text Line, and a trustee of the National Museum of the American Indian. She received a bachelor’s degree in computer science from Brown University, a master’s degree from the MIT Media Lab, and a PhD in information from the University of California, Berkeley. Her Twitter handle is @zephoria, and her website is danah.org.
John Seely Brown
Executive Committee Member
John Seely Brown was the chief scientist of Xerox Corporation until April 2002 and the director of the Xerox Palo Alto Research Center (PARC) until June 2000. He currently serves as the independent cochairman for Deloitte’s Center for the Edge and is a visiting scholar and advisor to the provost at the University of Southern California. Brown is a member of the American Academy of Arts and Sciences and the National Academy of Education and a fellow of the American Association for Artificial Intelligence. He serves on numerous private and public boards of directors, including Amazon.com, and has been a trustee for nonprofits such as the MacArthur Foundation and In-Q-tel. He coauthored, with Paul Duguid, The Social Life of Information (HBS Press, 2000); and with John Hagel, The Only Sustainable Edge (HBS Press, 2005) and The Power of Pull (Basic Books, 2010). He coauthored his most recent book, A New Culture of Learning (CreateSpace, 2011), with Doug Thomas at USC and he coauthored his current book, Design Unbound, with Ann Pendleton-Jullian from Georgetown University. Brown received a BA from Brown University in 1962 in mathematics and physics and a PhD from the University of Michigan in 1970 in computer and communication sciences. His nine honorary degrees, reflecting the breadth and diversity of his leadership, include the following: May 2000, Brown University, honorary doctor of science; July 2001, London Business School, honorary doctor of science in economics; May 2004, Claremont Graduate University, honorary doctor of humane letters; May 2005, University of Michigan, honorary doctor of science; May 2009, North Carolina State University, honorary doctor of science; May 2011, Illinois Institute of Technology, honorary doctor of design; July 2013, Singapore Management University, doctor of information systems; May 2014, Bates College, honorary doctor of science; and May 2015, Arizona State University, honorary doctor of humane letters.
Teresa P. R. Caldeira
Teresa P. R. Caldeira is professor and chair of the Department of City and Regional Planning and codirector of Global Metropolitan Studies at UC Berkeley. She is also professor of geography and a member of the Steering Committee of the UC Berkeley-Mellon Global Urban Humanities Initiative. Her research focuses on the predicaments of urbanization, such as spatial segregation, social discrimination, and the uses of public space in cities of the global south. She has analyzed the processes that generate these cities, such as peripheral urbanization and autoconstruction, highlighting their inventiveness, political cartographies, and modes of collective life. An anthropologist by training, she has been especially interested in reshaping ethnographic methods for the study of cities and political action, a practice exemplified in her award-winning book City of Walls: Crime, Segregation, and Citizenship in São Paulo (University of California Press, 2001). One of her current research projects examines a diverse range of urban practices and artistic interventions—from graffiti to poetry; from rap to motorcycling—that are transforming the city of São Paulo and its public spaces and that articulate anew the profound social inequalities that have always marked the city. She is the recipient of a UC Berkeley Faculty Mentor Award and of a UC President’s Faculty Research Fellowship in the Humanities. In 2012 she was named a Guggenheim Fellow. Caldeira was educated at the University of São Paulo (BA in social sciences and MA in political science) and at the University of California, Berkeley (PhD in anthropology). She worked as a professor and researcher in the Brazilian university system between 1980 and 1996. She was a researcher at the Brazilian Center for Analysis and Planning (CEBRAP), one of Brazil’s most important research centers in the social sciences, for fifteen years. She was also a professor at the University of Campinas (UNICAMP), São Paulo, before joining the University of California, Irvine. She became a member of the UC Berkeley faculty in 2007. Her work has been published in several languages.
Dame Sandra Dawson
Executive Committee Chair
Dame Sandra Dawson is KPMG Professor of Management Studies at Judge Business School. She has served as a deputy vice chancellor of the University of Cambridge (2007–2012); master of Sidney Sussex College (1999–2009), the first woman to hold such an office in one of the Cambridge colleges, founded originally for men; and director of Judge Business School (1995–2006). Dawson’s research focuses on leadership, knowledge sharing, organizational change, and health management and policy. She serves as a board member of DRS PLC, the Institute for Government, and the Financial Services Authority. Previous board memberships include Oxfam, Barclays Bank, and an investment trust. She is a member of an advisory group for Aga Khan University on the establishment of a management school to serve the needs of emerging economies, the UK-India Round Table, and the British prime minister’s Council for Science and Technology. Prior to her appointment at Cambridge University, Dawson was professor of organizational behavior and deputy director of the Management School at Imperial College, London University. She holds a BA from Keele University and an MA from the University of Cambridge. She has been awarded an honorary DSc from Keele as well as fellowship status from City and Guilds and was honored with the Dame Commander of the Order of the British Empire.
Isabelle de Lamberterie
Isabelle de Lamberterie has been a researcher on comparative law at the Centre National de la Recherche Scientifique in Paris since 1969 and is now director of research emerita. She has coauthored Principes du droit européen du contrat, on contract law (2004); Dictionnaire comparé du droit d’auteur et du copyright, on intellectual property (2003); and Informatique, libertés et recherche médicale, on the protection of privacy (2001). During the 1970s and 1980s, her work addressed the regulation of new technologies: informatics in Les techniques contractuelles suscitées par l’informatique (1977), and the protection of software in La protection du logiciel: Enjeux juridiques et économiques, with Gilles Bertin (1985). More recently, her focus has been partly on digitization and the Internet, nanotechnology, and the medical sector, as well as the regulation of research, and her work has generally been conducted in partnership with researchers in other disciplines. She has taught at the University of Montpellier, University of Paris XIII, and University of Poitiers and directed about twenty doctoral theses. She has held various positions in state institutions, including member of the ethics committee of the Centre National de la Recherche Scientifique (1998–2007) and member of one of the advisory committees for the minister of research, Conseil Supérieur de la Recherche et de la Technologie (2006–2014). She currently chairs the scientific advisory committee for the program on digitization and concerted development in legal studies at the Bibliothèque Nationale de France and is a member—as emeritus—of the Institut de Sciences Sociales du politique (ISP), Université Paris-Saclay/Université de Nanterre.
Chair • Executive Committee Member
Mamadou Diouf is Leitner Family Professor of African Studies and History at Columbia University, where he also leads the Institute of African Studies. Prior to teaching at Columbia, he taught at the University of Michigan, Ann Arbor, and before that at Cheikh Anta Diop University in his native Senegal. Educated primarily in France, Diouf is a renowned West African scholar who has guest lectured at many European and American universities. He holds a PhD from the University of Paris–Sorbonne. His research interests include urban, political, social, and intellectual history in colonial and postcolonial Africa. He is the author, coauthor, or editor of numerous books, including The Arts of Citizenship in African Cities: Infrastructures and Spaces of Belonging, edited with Rosalind Fredericks (Palgrave Macmillan, 2014); Tolerance, Democracy, and Sufis in Senegal (Columbia University Press, 2013); Les arts de la citoyenneté au Senegal: Espaces contestés et civilité urbaine, edited with Rosalind Fredericks (Karthala, 2013); Rhythms of the Afro-Atlantic World: Rituals and Remembrances, edited with I. Nwankwo (University of Michigan Press, 2010); New Perspectives on Islam in Senegal: Conversion, Migration, Wealth, Power, and Femininity, edited with Mara Leichtman (Palgrave Macmillan, 2009); La construction de l’État au Sénégal, with M. C. Diop and D. Cruise O’Brien (Karthala, 2002); Histoire du Sénégal: Le modèle islamo-wolof et ses périphéries (Maisonneuve et Larose, 2001); Les jeunes: Hantise de l’espace public dans les sociétés du Sud (l’Aube, 2001); and Les figures du politique en Afrique: Des pouvoirs hérités aux pouvoirs élus (Karthala, 1999). He is also a member of the editorial boards of several professional journals, including African Studies Review and la vie des idées.fr. His volume Une histoire du Sénégal: Héritages et contestations du modèle islamo-wolof is forthcoming with Karthala in 2017. He is editor of the Présence Africaine history book series.
Michael Gellert is a general partner of Windcrest Partners, which he cofounded in 1968, a director of Dalet Technologies, and a director emeritus of Seacor Holdings. Gellert is active in a number of nonprofit organizations, including the Carnegie Institution for Science, the New School, Human Rights Watch, the Caramoor Center for Music and the Arts, and the New York City Opera. He received a BA from Harvard University and an MBA from the Wharton School.
Investment Committee Member
Ed Glaeser is Fred and Eleanor Glimp Professor of Economics at Harvard, where he has taught since 1992. He serves as director of the Taubman Center for State and Local Government and the Rappaport Institute for Greater Boston. He studies the economics of cities and has written on scores of urban issues, including the growth of cities, segregation, crime, and housing markets. In particular, his work has focused on the determinants of city growth and the role of cities as centers of idea transmission. He has been particularly interested in the role that geographic proximity can play in creating knowledge and innovation. He received his PhD from the University of Chicago in 1992. Dr. Glaeser has written numerous journal and op-ed articles. His books include Cities, Agglomeration, and Spatial Equilibrium (Oxford University Press, 2008), Rethinking Federal Housing Policy (American Enterprise Institute Press, 2008), and Triumph of the City (Penguin Press, 2011).
William H. Janeway
Investment Committee Member • Executive Committee Member • Secretary
William H. Janeway is a senior advisor and managing director of Warburg Pincus. He joined Warburg Pincus in 1988 and was responsible for building the information technology investment practice. Previously, he was executive vice president and director at Eberstadt Fleming. Dr. Janeway is a director of Magnet Systems, Nuance Communications, and O’Reilly Media. He is an affiliated member of the Faculty of Economics at Cambridge University. Dr. Janeway is a member of the board directors of the Fields Institute for Research in the Mathematical Sciences and the board of governors of the Institute for New Economic Thinking, and of the advisory board of the Princeton Bendheim Center for Finance. He is a member of the management committee of the Cambridge-INET Institute, University of Cambridge, and a member of the board of managers of the Cambridge Endowment for Research in Finance (CERF). He is the author of Doing Capitalism in the Innovation Economy: Markets, Speculation and the State, published by Cambridge University Press in November 2012. Dr. Janeway received his doctorate in economics from Cambridge University, where he was a Marshall Scholar. He was valedictorian of the class of 1965 at Princeton University.
Naomi R. Lamoreaux
Naomi R. Lamoreaux is Stanley B. Resor Professor of Economics and History at Yale University, chair of the Yale Department of History, and a research associate at the National Bureau of Economic Research. She received her BA in history from SUNY Binghamton in 1972 and her PhD in history from Johns Hopkins University in 1979. She taught at Brown University from 1979 to 1996 and the University of California, Los Angeles, from 1996 to 2010. She has written The Great Merger Movement in American Business, 1895–1904 and Insider Lending: Banks, Personal Connections, and Economic Development in Industrial New England, edited five other books, and published scores of articles on business, economic, and financial history. She also coedited the Journal of Economic History from 1992 to 1996. Lamoreaux is a fellow of the American Academy of Arts and Sciences and has served as president of the Business History Conference and the Economic History Association. Her current research interests include patenting and the market for technology in the United States, the rise and decline of the Cleveland innovative region, business organizational forms and contractual freedom in the United States and Europe, and the organizational roots of the constitutional right to privacy.
Peter Lange joined the Department of Political Science at Duke University in 1981 after a previous teaching position at Harvard University. Since arriving at Duke, he has been associate professor (1982–1989), full professor (since 1989), and chair of the Department of Political Science (1996–1999). He became the Thomas A. Langford University Professor in 2010. He assumed his position as the provost of Duke University in July 1999 and stepped down on July 1, 2014. Earlier, he served as the special assistant to the provost for international affairs (1993–1994) and as the vice provost for academic and international affairs (1994–1996). Lange also chaired the committee that produced the proposal for Curriculum 2000, the substantially revised curriculum for Duke Arts and Sciences undergraduates, which was implemented in the fall of 2000. He remains on the board of Duke Kunshan University. Lange earned his BA from Oberlin College in 1967 and his PhD from the Department of Political Science at the Massachusetts Institute of Technology in 1975. Lange has earned numerous fellowships, including the Woodrow Wilson Fellowship in 1967, and was a Fulbright Research Scholar in Milan, Italy, in 1986. He became an honorary citizen of Kunshan, China, in 2013, and in 2014 he became both a Duke University Bass Fellow and a fellow of the American Association for the Advancement of Science. In April 2014, the directorship of DukeEngage was named in his honor by an anonymous donor. As a professor, Lange focuses on topics of comparative politics and political economy. His early work focused on Italian politics and the Italian Communist Party. He subsequently studied European trade union movements. In recent years, his research focus has turned to the economic performance of the advanced industrial democracies and the effects of globalization on these relationships. More recently, he has turned his attention to the dynamics of higher education in the United States and globally. He is currently vice president of academic consulting at Isaacson, Miller and chief academic advisor at Academic Analytics, engaged in providing advisory services to higher education leadership, and serves on the board of the Research Triangle Institute.
Executive Committee Member
Margaret Levi is the director of the Center for Advanced Study in the Behavioral Sciences (CASBS) and professor of political science, Stanford University, and Jere L. Bacharach Professor Emerita of International Studies in the Department of Political Science at the University of Washington. She earned her BA from Bryn Mawr College in 1968 and her PhD from Harvard University in 1974. She became a fellow of the American Academy of Arts and Sciences in 2001 and a John Simon Guggenheim Fellow in 2002. She served as president of the American Political Science Association from 2004 to 2005. Her books include the sole-authored Of Rule and Revenue (University of California Press, 1988) and Consent, Dissent, and Patriotism (Cambridge University Press, 1997); and the coauthored Analytic Narratives (Princeton University Press, 1998) and Cooperation without Trust? (Russell Sage, 2005). Her most recent books are In the Interest of Others (Princeton, 2013), with John Ahlquist, and Labor Standards in International Supply Chains: Aligning Rights and Incentives (Elgar, 2015), with Daniel Berliner, Anne Greenleaf, Milli Lake, and Jennifer Noveck. She serves as general editor of Cambridge Studies in Comparative Politics and cogeneral editor of the Annual Review of Political Science. Levi serves on the boards of the Social Science Research Council (SSRC), the Center for Advanced Studies in the Social Sciences (CEACS) in Madrid, and the Scholar and Research Group of the World Justice Project.
Sara Miller McCune
Sara Miller McCune is the founder and executive chairman of SAGE Publishing, with subsidiary companies and sales offices in Los Angeles, Washington, DC, London, India, East Asia, Melbourne, and Latin America. McCune remains actively involved in the company’s ongoing expansion and development. McCune is also cofounder and president of the McCune Foundation, based in Ventura, California. In 2007, she founded the Santa Barbara–based Miller-McCune Center for Research, Media and Public Policy, which launched the award-winning print and online magazine Pacific Standard. In 2017, the magazine and the center’s mission were transferred to the Social Justice Foundation, a nonprofit organization supported by SAGE Publishing. She is currently a member of the Board of Directors of the Center for Advanced Study in the Behavioral Sciences at Stanford University and a member of the Board of Directors and the Visiting Committee of the Social Science Research Council. McCune is a graduate of Queens College of the City University of New York.
Helen V. Milner
Investment Committee Member
Helen V. Milner is B. C. Forbes Professor of Politics and International Affairs at Princeton University and director of the Niehaus Center for Globalization and Governance at Princeton’s Woodrow Wilson School. She has written extensively on issues related to international political economy; the connections between domestic politics and foreign policy, globalization, and regionalism; and the relationship between democracy and trade policy. In addition to numerous articles, her writings include the volumes Resisting Protectionism (1988); Interests, Institutions, and Information: Domestic Politics and International Relations (1997); The Political Economy of Regionalism (coedited with Edward Mansfield, 1997); Internationalization and Domestic Politics (coedited with Robert Keohane, 1996), and Votes, Vetoes, and the Political Economy of International Trade Agreements (coauthored with Edward Mansfield, 2012). Milner is currently working on issues related to globalization and development, such as the political economy of foreign aid; the “digital divide” and the global diffusion of the Internet; and the relationship between globalization and democracy. Another strand of her recent research deals with American foreign policy and the so-called grand strategy of liberal internationalism, and she is investigating the sources of public and elite preferences for engagement with the international economy in the areas of international trade, foreign aid, and immigration. Milner is president of the International Political Science Association.
Investment Committee Chair
Peter Nager is senior managing director at the investment firm Egret Capital Partners. He is a former partner of the corporate advisory and investment banking firm James D. Wolfensohn. Following the sale of Wolfensohn to Bankers Trust (BT), he became a partner and senior managing director at BT and assumed the same positions with Deutsche Bank upon its merger with BT. Earlier in his career, he was a lawyer at the firm Debevoise & Plimpton, specializing in mergers and acquisitions. Nager has advised the boards, CEOs, and other senior executives of such noteworthy companies as Dupont, Unisys, Lubrizol, Johns Manville, Major League Baseball, John Labatt, Northern Telecom, Ault Foods, and Nova Chemicals. His advisory work encompassed traditional transactional mergers-and-acquisitions work as well as financing assistance and corporate strategy. Nager is involved in numerous charitable endeavors. He is a member of the board of trustees and of the executive committee of the Caramoor International Music Festival, held every summer in Westchester County, NY, as well as of the Boards of Trustees of the Beaver Dam Sanctuary, also in Westchester County, and the City Parks Foundation in New York City. He also is a member of the NYU-Poly Incubator Advisory Board. Previously, Nager served as president of Symphony Space on the Upper West Side of Manhattan.
Walter W. Powell
Executive Committee Member • Audit Committee Member
Walter W. Powell is professor of education and sociology, organizational behavior, management science and engineering, public policy, and communication at Stanford University. He works in the areas of organization theory, economic sociology, and the sociology of science. His interests focus on the processes through which knowledge is transferred across organizations, and the roles of networks in facilitating or hindering innovation and of institutions in codifying ideas. He is the author or editor of Books: The Culture and Commerce of Publishing, with Lewis Coser and Charles Kadushin (Basic Books, 1982); Getting into Print: The Decision-Making Process in Scholarly Publishing (University of Chicago Press, 1985); The New Institutionalism in Organizational Analysis, with Paul DiMaggio (University of Chicago Press, 1991); Private Action and the Public Good, with Elisabeth Clemens (Yale University Press, 1997); and The Nonprofit Sector, with Richard Steinberg (Yale University Press, 2006). His most recent book, with John Padgett, is The Emergence of Organizations and Markets (Princeton University Press, 2012). He received his PhD in sociology from Stony Brook University and previously taught at Yale, MIT, and the University of Arizona. He holds honorary degrees from Uppsala University, Copenhagen Business School, and the Helsinki School of Economics and is a foreign member of the Swedish Royal Academy of Science.
José A. Scheinkman
Investment Committee Member
José A. Scheinkman is the Edwin W. Rickert Professor of Economics at Columbia University, Theodore A. Wells ’29 Professor of Economics emeritus at Princeton University, and a research associate at the National Bureau of Economic Research. Previously, Scheinkman was the Alvin H. Baum Distinguished Service Professor and chairman of the Department of Economics at the University of Chicago, Blaise Pascal Research Professor (France), visiting professor at Collège de France, vice president in the Financial Strategies Group of Goldman, Sachs & Co., and coeditor of the Journal of Political Economy. He has served as a consultant to several financial institutions and is a member of the board of directors of Cosan Limited, a NYSE-listed company engaged in the production and distribution of sugar, ethanol, energy, and logistic services in Brazil. His research has focused on building mathematical models that shed light on a variety of economic and social phenomena, such as economic fluctuations, the nature of oligopolistic competition, the growth of cities, informal economic activity, the spatial distribution of crime, and the dynamics of asset prices and asset-price bubbles. Scheinkman is a member of the National Academy of Sciences, fellow of the American Academy of Arts and Sciences, fellow of the Econometric Society, corresponding member of the Brazilian Academy of Sciences, and recipient of a John Simon Guggenheim Memorial Fellowship and of a doctorat honoris causa from the Université Paris-Dauphine.
Audit Committee Chair
Barbara Stallings is William R. Rhodes Research Professor at the Watson Institute for International Studies at Brown University and editor of Studies in Comparative International Development. Before arriving at Brown in 2002, she was director of the Economic Development Division of the UN Economic Commission for Latin America and the Caribbean in Santiago, Chile (1993–2002), and professor of political economy at the University of Wisconsin–Madison (1977–1993). She has been a visiting professor or visiting scholar at Harvard, Yale, Princeton, Columbia, Berkeley, the University of Tokyo, the Institute for Southeast Asian Studies, the Institute for Fiscal and Monetary Affairs of Japan’s Ministry of Finance, and a number of universities and research centers in Latin America. She has doctorates in economics (University of Cambridge) and in political science (Stanford University) and is a specialist in development economics, with an emphasis on development strategies and international finance. In addition, she works on issues of economic relations between Asia and Latin America and comparisons between the two regions. Her most recent books are Innovation and Inclusion in Latin America: Strategies to Avoid the Middle Income Trap (2016) and Promoting Development: The Political Economy of East Asian Foreign Aid (2017). She has been teaching this spring at the Schwarzman Program at Tsinghua University in Beijing.