Discussion paper

DP20114 Non-Bayesian Learning in Misspecified Models

Deviations from Bayesian updating are traditionally categorized as biases, errors, or fallacies, thus implying their inherent ``sub-optimality.'' We offer a more nuanced view. We demonstrate that, in learning problems with misspecified models, non-Bayesian updating can outperform Bayesian updating.

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Citation

Bervoets, S, M Faure and L Renou (2025), ‘DP20114 Non-Bayesian Learning in Misspecified Models‘, CEPR Discussion Paper No. 20114. CEPR Press, Paris & London. https://cepr.org/publications/dp20114