Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/15877
Title: A Simple and Adaptive Dispersion Regression Model for Count Data
Authors: Yu, K
Vinciotti, V
Klakattawi, H
Issue Date: 2018
Citation: Entropy
Abstract: Regression for count data is widely performed by models such as Poisson, negative binomial (NB) and zero-inflated regression. A challenge often faced by practitioners is the selection of the right model to take into account dispersion, which typically occurs in count datasets. It is highly desirable to have a unified model that can automatically adapt to the underlying dispersion and that can be easily implemented in practice. In this paper, a discreteWeibull regression model is shown to be able to adapt in a simple way to different types of dispersions relative to Poisson regression: overdispersion, underdispersion and covariate-specific dispersion. Maximum likelihood can be used for efficient parameter estimation. The description of the model, parameter inference and model diagnostics is accompanied by simulated and real data analyses.
URI: http://bura.brunel.ac.uk/handle/2438/15877
ISSN: 1099-4300
Appears in Collections:Dept of Electronic and Computer Engineering Research Papers

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