The Ultimatum Game and Trial by Fire

Alex Imas is the Roger L. and Rachel M. Goetz Professor of Behavioral Science, Economics and Applied AI and a Vasilou Faculty Scholar at the University of Chicago Booth School of Business, where he has taught Negotiations and Behavioral Economics. He is a Faculty Affiliate of the Center for Applied AI and the Human Capital & Economic Opportunity, an NBER Faculty Research Associate, and a CESifo Research Network Fellow. He is also an Associate Editor at the Journal of the European Economic Association and on the editorial board of Psychological Science.

Alex studies behavioral economics with a focus on how people understand and mentally represent the choices they are facing. His research explores topics related to how people learn and make choices in settings with risk and uncertainty. He also studies the economics of artificial intelligence and discrimination. Alex’s work utilizes a variety of methods, including controlled laboratory experiments, field experiments, analysis of observational data and theoretical modeling.

Alex Imas is the recipient of the 2023 Alfred P. Sloan Research Fellowship, the Review of Financial Studies Rising Scholar Award, the New Investigator Award from the Behavioral Science and Policy Association, the Hillel Einhorn New Investigator Award from the Society of Judgment and Decision Making, the Distinguished CESifo Affiliate Award, and the NSF Graduate Research Fellowship. He is the co-author, with Richard Thaler, of The Winner’s Curse: Behavioral Economics Anomalies, Then and Now (Simon and Schuster, 2025). He is an Associate Editor at the Journal of the European Economic Association and on the editorial board of Psychological Science.

Alex was born in Bender, Moldova. Previously, he was the William S. Dietrich II Assistant Professor of Behavioral Economics at Carnegie Mellon University, where he taught Behavioral Economics and Human Judgment and Decision Making. He did his PhD in economics at the University of California, San Diego and earned a BA from Northwestern University. Prior to graduate school, Imas helped found a startup and co-authored several patents as part of its intellectual property strategy.

Teaching materials for The Winner’s Curse can be found here.

Interviewer Peter Lorentzen is an Associate Professor of Economics at the University of San Francisco, where he leads the Master’s Program in International and Development Economics at the University of San Francisco. He is also a nonresident scholar at the UCSD 21st Century China Center and an alumnus of the Public Intellectuals Program of the National Committee on US-China Relations. His research focuses on the economics of information, incentives, and institutions, primarily as applied to the development and governance of China. He created the unique Master’s of Science in Applied Economics at the University of San Francisco, which teaches the conceptual frameworks and practical data analytics skills needed to succeed in the digital economy.

Guest interviewer Robizon Khubulashvili is an Assistant Professor of Economics at the University of San Francisco. His research is at the intersection of theoretical, behavioral, and experimental microeconomics. A common question in his research is, how can we use a user's revealed preferences to improve the performance of online platforms? Robizon has studied this question in two settings: when monetary incentives are missing (an online gaming platform) and when monetary incentives are present (an online gambling platform). His work suggests that heterogeneity among users is an essential consideration in designing better online platforms; that is, a policy benefiting one type of user might harm the other.

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