Behavioral Foundations of Nested Stochastic Choice and Nested Logit

Matthew Kovach and Gerelt Tserenjigmid

Journal of Political Economy, 2022, vol. 130, issue 9, 2411 - 2461

Abstract: We provide the first behavioral characterization of nested logit, a foundational and widely applied discrete-choice model, through the introduction of a nonparametric version of nested logit that we call “nested stochastic choice” (NSC). NSC is characterized by a single axiom that weakens independence of irrelevant alternatives on the basis of revealed similarity to allow for the similarity effect. Nested logit is characterized by an additional menu-independence axiom. Our axiomatic characterization leads to a practical, data-driven algorithm that identifies the true nest structure from choice data. We also discuss limitations of generalizing nested logit by studying the testable implications of cross-nested logit.

Date: 2022
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