Bayesian Networks and Boundedly Rational Expectations

S-Tier
Journal: Quarterly Journal of Economics
Year: 2016
Volume: 131
Issue: 3
Pages: 1243-1290

Score contribution per author:

8.043 = (α=2.01 / 1 authors) × 4.0x S-tier

α: calibrated so average coauthorship-adjusted count equals average raw count

Abstract

I present a framework for analyzing decision making under imperfect understanding of correlation structures and causal relations. A decision maker (DM) faces an objective long-run probability distribution p over several variables (including the action taken by previous DMs). The DM is characterized by a subjective causal model, represented by a directed acyclic graph over the set of variable labels. The DM attempts to fit this model to p, resulting in a subjective belief that distorts p by factorizing it according to the graph via the standard Bayesian network formula. As a result of this belief distortion, the DM’s evaluation of actions can vary with their long-run frequencies. Accordingly, I define a "personal equilibrium" notion of individual behavior. The framework enables simple graphical representations of causal-attribution errors (such as coarseness or reverse causation), and provides tools for checking rationality properties of the DM’s behavior. I demonstrate the framework’s scope of applications with examples covering diverse areas, from demand for education to public policy. JEL Code: D03.

Technical Details

RePEc Handle
repec:oup:qjecon:v:131:y:2016:i:3:p:1243-1290.
Journal Field
General
Author Count
1
Added to Database
2026-01-29