Proportional hazards models with discrete frailty

Caroni, Chrys, Crowder, Martin and Kimber, Alan (2009) Proportional hazards models with discrete frailty , Southampton, UK University of Southampton, Statistical Sciences Research Institute 18pp. (Methodology working papers, M09/08).


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We extend proportional hazards frailty models for lifetime data to allow a negative bi-nomial, Poisson, Geometric or other discrete distribution of the frailty variable. This might represent, for example, the unknown number of flaws in an item under test. Zero frailty corresponds to a limited failure model containing a proportion of units that never fail (long- term survivors). Ways of modifying the model to avoid this are discussed. The models are
applied to a previously published set of data on failures of printed circuit boards and to new data on breaking strengths of samples of cord.

Item Type: Monograph (Working Paper)
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Keywords: reliability analysis, lifetime data, proportional hazards, frailty models, discrete distribution, limited failure model
ePrint ID: 66092
Date :
Date Event
27 April 2009Submitted
Date Deposited: 28 Apr 2009
Last Modified: 18 Apr 2017 21:44
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