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Abstract: We consider the issue of assessing influence of observations in the class ofBirnbaum-Saunders nonlinear regression models, which is useful in lifetime dataanalysis. Our results generalize those in Galea et al. 2004, Influencediagnostics in log-Birnbaum-Saunders regression models. Journal of AppliedStatistics, 31, 1049-1064 which are confined to Birnbaum-Saunders linearregression models. Some influence methods, such as the local influence, totallocal influence of an individual and generalized leverage are discussed.Additionally, the normal curvatures of local influence are derived undervarious perturbation schemes.



Author: Artur J. Lemonte

Source: https://arxiv.org/







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