Journal
JOURNAL OF MATHEMATICAL ECONOMICS
Volume 110, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmateco.2023.102920
Keywords
Stochastic choice; Luce rule; Choice overload
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This paper proposes a simple extension to analyze the impact of menu complexity on alternative choices and characterizes its mathematical properties. The research shows that, in some cases, people are more likely to choose the default option as the menu size increases. Furthermore, the study relates this model to the class of perturbed utility models.
This paper proposes and characterizes a simple extension to the Luce rule when the value of each alternative can be enhanced or diminished by a non-negative menu dependent parameter that can be thought of as a measure of menu complexity. The characterization follows from two properties that hinge on the default option: monotone consistency and strong independent log-odds. We make no restriction on the domain of menus so that we may not see choice probabilities from every menu. For these models, we show it is possible to describe choice overload where the default option is chosen more often as menu size increases. It is also shown how this model relates to the class of perturbed utility models.
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