Menahem Yaari is a Professor Emeritus of Economics at the Hebrew University of Jerusalem, where he held the Schonbrunn Chair in Mathematical Economics. His undergraduate degree, in economics and philosophy, was granted by the Hebrew University in 1958. From 1958 to 1962, he was a graduate student at Stanford University, earning a Ph.D. in economics and statistics. From 1962 to 1967, he was assistant professor and then associate professor at Yale University and a member of the Cowles Foundation for Research in Economics. He has been on the faculty of the Hebrew University since 1967. He served as coeditor of Econometrica from 1968 to 1975 and was elected a Fellow of the Econometric Society in 1970. He was President of the Open University of Israel (1992-1997), Director of the Institute for Advanced Studies (1985-1992), and Vice President of the Israel Academy of Sciences and Humanities (1994-1995). Since 2002, he has been a Founding Co-Chair of the Israeli-Palestinian Science Organization (IPSO). In 2004-2010, he served as president of the Israel Academy of Sciences and Humanities. He is a founding member of the Center for the Study of Rationality at the Hebrew University, and in 1992-2004 he chaired the Center’s Academic Committee. Menahem Yaari is a member of the American Philosophical Society and the Berlin-Bradenburg Academy of Sciences. Professor Yaari's research has been mainly in the economics of uncertainty, in consumer theory, and in economic justice. Yaari held numerous visiting professorships, including Berkeley, Pennsylvania, London School of Economics, Cambridge University and University of London.