Characterizations and generalizations of the negative binomial distribution

Katiane S. Conceição (), Marinho G. Andrade, Francisco Louzada and Nalini Ravishanker
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Katiane S. Conceição: University of São Paulo
Marinho G. Andrade: University of São Paulo
Francisco Louzada: University of São Paulo
Nalini Ravishanker: University of Connecticut

Computational Statistics, 2022, vol. 37, issue 3, No 11, 1255-1286

Abstract: Abstract In this paper, we give detailed descriptions of the Zero-Modified Negative Binomial distribution for analyzing count data. In particular, we study the characterizations and properties of this distribution, whose main advantage is its flexibility which makes it suitable for modeling a wide range of overdispersed and underdispersed count data (which may or may not be caused by zero-modification, i.e., the inflation or deflation of zeroes), without requiring previous knowledge about any of these inherent data characteristics. We derive maximum likelihood estimation of the model parameters based on positive observations, and evaluate the loss of efficiency by considering this procedure. We illustrate the suitability of this distribution on real data sets with different types of zero-modification.

Keywords: Zero-modified negative binomial distribution; Underdispersion; Zero-deflated count data; Relative efficiency (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1007/s00180-021-01150-y

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