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Test for Heteroscedasticity in Poisson-gamma Models with Random Clusters


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Test for Heteroscedasticity in Poisson-gamma Models with Random Clusters
XIE Jian-chun1LI Jian-jun1LIN Jin-guan2
1.School of Sciences,NUST,Nanjing 210094,China;2.Department of Mathematics,Southeast University,Nanjing 210096,China
Poisson-gamma model dispersions heteroscedasticity random cluster score test
In view of the actuality that the test for heteroscedasticity is supposed in fixed clusters,a test for heteroscedasticity in random clusters is proposed here.The method of variances parameterization is utilized to investigate the test for heteroscedasticity in Poisson-gamma regression model of longitudinal data.The composite tests for heteroscedasticity and random clusters are given.The statistic data of score test is obtained.A numerical example of the real data is given here to illustrate the effectiveness.


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Last Update: 2012-11-19