... He has a Ph.D. in nonlinear regression models and is Doctor of Science based on a thesis on frailty models ... ... dependence 236 -- 7.4 Positive stable frailty distributions 237 -- 7.4.1 Updating 238 -- 7.4.2 Regression ... ... models 238 -- 7.4.3 The stable-Weibull model 238 -- 7.4.4 Weibull regression models 240 -- 7.5 PVF frailty ... ... distributions 241 -- 7.5.1 Weibull and regression models 243 -- 7.5.2 Updating 243 -- 7.6 Lognormal ... ... full conditional estimate 269 -- 8.6.1 The gamma model 270 -- 8.6.2 The PVF model 272 -- 8.7 The penalized ...