References
- Clayton , D. G. 1978 . A model for association in bivariate life tables and its application in epidemiological studies of familial tendency in chronic disease incidence . Biometrika , 65 : 141 – 151 . (doi:10.1093/biomet/65.1.141)
- Vaupel , J. A. , Manton , K. G. and Stallard , E. 1979 . The impact of heterogeneity in individual frailty on the dynamics of mortality . Demography , 16 : 439 – 454 . (doi:10.2307/2061224)
- Mendenhall , W. and Hader , R. J. 1958 . Estimation of parameters of mixed exponentially distributed failure time distributions from censored life test data . Biometrika , 45 : 504 – 520 .
- Kaylan , A. R. and Harris , C. M. 1981 . Efficient algorithms to derive maximum-likelihood estimates for finite exponential and Weibull mixtures . Comput. Oper. Res , 8 : 97 – 104 . (doi:10.1016/0305-0548(81)90037-X)
- Woodward , W. A. and Gunst , R. F. 1987 . Using mixtures of Weibull distributions to estimate mixing proportions . Comput. Statist. Data Anal , 5 : 163 – 176 . (doi:10.1016/0167-9473(87)90012-0)
- Hanagal , D. D. 2008 . Frailty regression models in mixture distribution . J. Statist. Plann. Inference , 138 : 2462 – 2468 . (doi:10.1016/j.jspi.2007.10.014)
- Ravishanker , N. and Dey , D. K. 2000 . Multivariate survival models with a mixture of positive stable frailties . Methodol. Comput. Appl. Probab , 2 ( 3 ) : 293 – 308 . (doi:10.1023/A:1010033329399)
- Hougaard , P. 1995 . Frailty models for survival data . Lifetime Data Anal , 1 : 255 – 273 . (doi:10.1007/BF00985760)
- Hougaard , P. 1984 . Life table methods for heterogeneous populations: Distributions describing the heterogeneity . Biometrika , 71 : 75 – 83 . (doi:10.1093/biomet/71.1.75)
- Economou , P. and Caroni , C. 2005 . Graphical tests for the assumption of gamma and inverse Gaussian frailty distributions . Lifetime Data Anal , 11 : 565 – 582 . (doi:10.1007/s10985-005-5240-0)
- Economou , P. and Caroni , C. 2008 . “ Closure properties and diagnostic plots for the frailty distribution in proportional hazards models ” . In Statistical Models and Methods for Biomedical and Technical Systems , Edited by: Vonta , F. , Nikulin , M. , Limnios , N. and Huber-Carol , C. 43 – 53 . Boston , MA : Birkhauser .
- Hougaard , P. 1986 . Survival models for heterogeneous populations derived from stable distributions . Biometrika , 73 : 387 – 396 . (doi:10.1093/biomet/73.2.387)
- Kalbfleisch , J. D. and Prentice , R. L. 1980 . The Statistical Analysis of Failure Time Data , New York : Wiley .
- Therneau , T. M. and Grambsch , P. M. 2000 . Modeling Survival Data, Extending the Cox Model , New York : Springer .
- Klein , J. P. and Moeschberger , M. L. 1996 . Survival Analysis, A Self-learning Text , New York : Springer-Verlag .