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Title: A marginalized model for zero-inflated, overdispersed and correlated count data
Authors: MOLENBERGHS, Geert 
IDDI, Samuel 
Issue Date: 2013
Source: Electronic Journal of Applied Statistical Analysis, 6 (2), p. 149-165
Abstract: Iddi and Molenberghs (2012) merged the attractive features of the so-called combined model of Molenberghs et al. (2010) and the marginalized model of Heagerty (1999) for hierarchical non-Gaussian data with overdispersion. In this model, the fixed-effect parameters retain their marginal interpretation. Lee et al. (2011) also developed an extension of Heagerty (1999) to handle zero-inflation from count data, using the hurdle model. To bring together all of these features, a marginalized, zero-inflated, overdispersed model for correlated count data is proposed. Using two empirical sets of data, it is shown that the proposed model leads to important improvements in model fit.
Keywords: marginal multilevel model; maximum likelihood estimation; random effects model; negative binomial; overdispersion; partial Marginalization; poisson model; zero-inflation
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ISSN: 2070-5948
DOI: 10.1285/i20705948v6n2p149
Rights: © Università del Salento
Category: A1
Type: Journal Contribution
Validations: vabb 2016
Appears in Collections:Research publications

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