Kuhn’s Theorem shows that extensive games with perfect recall can equivalently be analyzed using mixed or behavioral strategies, as long as players are expected utility maximizers. This note constructs an example that illustrates the limits of Kuhn’s Theorem in an environment with ambiguity...

We study a model of non-Bayesian updating for ambiguity averse agents, based on the Hypothesis Testing model of Ortoleva (2012). Agents have a set of priors that they update as follows. If all priors assign to new information a probability above a threshold, they update every prior using Bayes...