Abstract
Nonparametric estimators of component and system life distributions are developed and presented for situations where recurrent competing risks data from series systems are available. The use of recurrences of components’ failures leads to improved efficiencies in statistical inference, thereby leading to resource-efficient experimental or study designs or improved inferences about the distributions governing the event times. Finite and asymptotic properties of the estimators are obtained through simulation studies and analytically. The detrimental impact of parametric model misspecification is also vividly demonstrated, lending credence to the virtue of adopting nonparametric or semiparametric models, especially in biomedical settings. The estimators are illustrated by applying them to a data set pertaining to car repairs for vehicles that were under warranty.
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Acknowledgments
The authors would like to thank Professor Ananda Sen of the University of Michigan for providing the car warranty data. The authors thank the Reviewers, Associate Editor, and Editor for their comments that led to improvements. They are also grateful to Professors Jason Fine and Bo Lindqvist for inviting them to contribute to this special issue. Research partially supported by NSF Grant DMS1106435 and NIH Grants R01 CA154731 and P20 RR17698.
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Taylor, L.L., Peña, E.A. Nonparametric estimation with recurrent competing risks data. Lifetime Data Anal 20, 514–537 (2014). https://doi.org/10.1007/s10985-013-9280-6
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DOI: https://doi.org/10.1007/s10985-013-9280-6