Moment estimators for the beta-binomial distribution |
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| Authors: | E. Yamamoto T. Yanagimoto |
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| Affiliation: | 1. Okayama University of Science , Okayama;2. The Institute of Statistical Mathematics , Tokyo |
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| Abstract: | A new moment estimator of the dispersion parameter of the beta-binomial distribution is proposed. It is derived by the method of moments which is constrained to satisfy the unbiasedness of the estimating equation. It gives a better performance than those of the usual moment estimators and the stabilized moment estimator proposed by Tamura & Young. The bias of the estimator is smaller than that of the maximum likelihood estimate in a wide range of parameter space. |
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