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Bayesian paradigm for analysing count data in longitudina studies using Poisson-generalized log-gamma model
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Taban Baghfalaki *   |
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Abstract: (1951 Views) |
| In analyzing longitudinal data with counted responses, normal distribution is usually used for distribution of the random efffects. However, in some applications random effects may not be normally distributed. Misspecification of this distribution may cause reduction of efficiency of estimators. In this paper, a generalized log-gamma distribution is used for the random effects which includes the normal one as a special case. As the frquentist analysis faces with complex computation, the Bayesian analysis of this model is investigated and then it is utilized for analyzing two real data sets. Also, some simulation studies are conducted to evaluate the performance of the relevant models. |
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| Keywords: Generalized log-gamma distribution, Poisson mixed model, Count data, Overdispersion, Random-effect models, Multivariate negative binomial model |
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Full-Text [PDF 849 kb]
(939 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2020/11/19 | Accepted: 2021/03/17 | Published: 2021/03/18
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