Econometrics Seminar - Nail Kashaev, Western University


Location: 3060F Jenkins Nanovic Halls

Interested parties are welcome to attend.

Presentation Title: "Identification and Estimation of Discrete Choice Models with Unobserved Choice Sets"


We propose a framework for nonparametric identification and estimation of discrete choice models with unobserved choice sets. We recover the joint distribution of choice sets and preferences from a cross-section of repeated choices. We assume that either the latent choice sets are sparse or that the number of repeated choices is sufficiently large. Sparsity requires the number of possible choice sets to be relatively small. It is satisfied, for instance, when the choice sets are nested, or when they form a partition. Our estimation procedure is computationally fast and uses mixed-integer optimization to recover the sparse support of choice sets. Analyzing the ready-to-eat cereal industry using a household scanner dataset, we find that ignoring the unobservability of choice sets can lead to incorrect estimates of preferences due to significant latent heterogeneity in choice sets.




Contact Marinho Bertanha for information.