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American Economic Review Vol. 110 No. 5 2020

Learning under Diverse World Views: Model-Based Inference

George J. Mailath1; Larry Samuelson2

1 Department of Economics, University of Pennsylvania, and Research School of Economics, Australian National University (email: ) · 2 Department of Economics, Yale University (email: )

Abstract

People reason about uncertainty with deliberately incomplete models. How do people hampered by different, incomplete views of the world learn from each other? We introduce a model of “ model-based inference.” Model-based reasoners partition an otherwise hopelessly complex state space into a manageable model. Unless the differences in agents’ models are trivial, interactions will often not lead agents to have common beliefs or beliefs near the correct-model belief. If the agents’ models have enough in common, then interacting will lead agents to similar beliefs, even if their models also exhibit some bizarre idiosyncrasies and their information is widely dispersed.

DOI
10.1257/aer.20190080
Volume
110
Issue
5
Pages
1464-1501
Language
en
Sources
bibtex:phds-export.bib crossref openalex

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