The Influence of Random Effects on the Unconditional Hazard Rate and Survival Functions
本文推导出随机效应会导致无条件风险率和生存时间被低估的一般性结论，且无需对随机效应做分布假设，对生存分析建模有指导意义。
The consequences of introducing random effects have been a major issue in models for survival analysis. A general result is derived to establish the underestimation of the unconditional hazard rate when a random effect is present. Also, the survival time is shown to be underestimated. No distributional assumption regarding the random effect is required.