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The Stata Journal
Volume 5 Number 3: pp. 385-394



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A simple approach to fit the beta-binomial model

Paulo Guimarães
Medical University of South Carolina
Abstract.   In this paper, I show how to estimate the parameters of the beta-binomial distribution and its multivariate generalization, the Dirichlet-multinomial distribution. This approach involves no additional programming, as it relies on an existing Stata command used for overdispersed count panel data. Including covariates to allow for regression models based in these distributions is straightforward.
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View all articles with these keywords: overdispersion, beta binomial, Dirichlet multinomial, fixed-effects negative binomial

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