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Frailty regression models in mixture distributions
Authors:David D Hanagal  
Institution:

aDepartment of Statistics, University of Pune, Pune 411007, India

Abstract:We propose frailty regression models in mixture distributions and assume the distribution of frailty as gamma or positive stable or power variance function distribution. We consider Weibull mixture as an example. There are some interesting situations like survival times in genetic epidemiology, dental implants of patients and twin births (both monozygotic and dizygotic) where genetic behavior (which is unknown and random) of patients follows a known frailty distribution. These are the situations which motivate to study this particular model.
Keywords:Frailty  Gamma  Mixture distribution  Parametric regression  Positive stable  Power variance function  Survival times  Weibull model
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