Polyhazard models for lifetime data. (English) Zbl 1059.62597
Summary: We propose a polyhazard model to deal with lifetime data associated with latent competing risks. The causes of failure are assumed unobserved and affecting individuals independently. The general framework allows a broad class of hazard models that includes the most common hazard-based models. The model accommodates bathtub and multimodal hazards, keeping enough flexibility for common lifetime data that cannot be accommodated by usual hazard-based models. Maximum likelihood estimation is discussed, and parametric simulation is used for hypothesis testing.
MSC:
| 62N02 | Estimation in survival analysis and censored data |
| 65C20 | Probabilistic models, generic numerical methods in probability and statistics |
Keywords:
bathtub and multimodal hazard curves; hazard models; latent competing risk; maximum likelihood estimation; parametric simulation; Weibull modelReferences:
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