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Multivariate gamma distributions-properties and shape estimation

 

作者: Teresa Kowalczyk,   Joanna Tyrcha,  

 

期刊: Statistics  (Taylor Available online 1989)
卷期: Volume 20, issue 3  

页码: 465-474

 

ISSN:0233-1888

 

年代: 1989

 

DOI:10.1080/02331888908802197

 

出版商: Akademie-Verlag

 

关键词: Iterative procedure;maximum likelihood estimators;mode;moment estimators;positively quadrant dependence;skewness

 

数据来源: Taylor

 

摘要:

A sequence of suitably defined multivariate gamma distributions with decreasing skewness is proved to converge to the respective multivariate normal distribution. Other properties of multivariate gamma distributions are given, and the generation of pseudorandom numbers is presented. Parameter estimation is shown to reduce to the evaluation of shape parameter ? in the univariate case. A new estimator of ?, based on the mode of the smallest sample observation, is proposed. A simulation study suggests that the estimator performs better than several other estimators being in use

 

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