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Caltech

Ulric B. and Evelyn L. Bray Social Sciences Seminar

Wednesday, April 15, 2026
4:00pm to 5:00pm
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Baxter B125
Learning from an Unknown DGP: Experimental Evidence on Belief Updating with AI Recommendations
Daniel Martin, Associate Professor of Economics and Wilcox Family Chair in Entrepreneurial Economics, UC Santa Barbara,

Abstract: Artificial intelligence (AI) tools have become commonplace in workplace settings and commercial interactions. These systems typically communicate through terse recommendations ("police reported ahead," "engine service required'") that convey general information about an underlying state without revealing the algorithm's uncertainty about the state. Despite their ubiquity, we still know remarkably little about how ordinary decision makers update their beliefs when faced with an unknown data generated process that provides such information. This paper provides evidence on this question using a controlled online experiment and finds that a tractable and parsimonious non-Bayesian model of belief revision fits the data better than leading alternatives.

Joint work with Matthew Kovach and Gerelt Tserenjigmid

For more information, please contact Mary Martin by phone at 626-395-4571 or by email at [email protected].