A New Zero-Inflated Negative Binomial Methodology for Latent Category Identification
42 Pages Posted: 14 Apr 2012 Last revised: 1 Nov 2012
Date Written: April 11, 2012
We introduce a new statistical procedure for the identification of unobserved categories that vary between individuals and in which objects may span multiple categories. This procedure can be used to analyze data from a proposed sorting task data in which individuals may simultaneously assign objects to multiple piles. The results of a synthetic example and a consumer psychology study involving categories of restaurant brands illustrate how the application of the proposed methodology to the new sorting task can account for a variety of categorization phenomena including multiple category memberships and for heterogeneity through individual differences in the saliency of latent category structures.
Keywords: categorization, unobserved Categories, heterogeneity, sorting task, consumer psychology
JEL Classification: C10, C20
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