Empirical analyses of twin mortality often use models with dependent unobserved frailty terms capturing genetic and … higher age. Estimates of correlations between the frailty terms by zygosity and the ensuing implications for the relative …

In survival analysis a large literature using frailty models, or models with unobserved heterogeneity, exist. In the … proportional hazard structure. First, the aspects of frailty modeling in univariate (proportional hazard, Cox) duration models are …

factors with frailty among older adults using a large, nationally representative cohort of community-dwelling Chinese sample … the association between risk factors and frailty and further calculated the absolute risk difference for the statistically … status as measured by educational attainment and neighborhood quality may increase the risk of late-life frailty among …

In survival analysis a large literature using frailty models, or models with unobserved heterogeneity, exist. In the … proportional hazard structure. First, the aspects of frailty modeling in univariate (proportional hazard, Cox) duration models are …