ICES Seminar in Experimental Economics and Game Theory
Revising Beliefs in Light of Unforeseen Events
Friday, October 4, 2024 12:00 PM to 1:00 PM EDT
Vernon Smith Hall (formerly Metropolitan Building), 5183
The ICES Seminar in Experimental Economics and Game Theory of the Fall 2024 semester will feature:
Durham University
Revising Beliefs in Light of Unforeseen Events
Abstract
Bayesian updating is the dominant theory of learning. However, the theory is silent about how individuals react to events that were previously unforeseen. We study how decision makers update their beliefs if unforeseen events materialize, and under which conditions they revise their views about previously observed relationships. We base our analysis on the framework of “reverse Bayesianism”, under which the relative likelihoods of prior beliefs remain unchanged after an unforeseen event materializes. We find that participants do not systematically deviate from reverse Bayesianism when the unforeseen changes result in a new world that contains elements of the old world. In contrast, if a regime change is possible, decision makers eventually overhaul their model of the old world in favor of a completely different view of uncertainty.
For more information about the Seminar Series, please visit the Seminar Schedule homepage.
