On a Singularity in the Likelihood for a Change-Point Hazard Rate Model
Nguyen等人(1984)在变点风险率模型的对数似然函数中发现了一个奇异性，本文指出若正确定义似然函数，该奇异性可被消除。
A singularity identified by Nguyen, Rogers & Walker (1984) in the log likelihood function for a change-point hazard rate model is eliminated if the likelihood function is appropriately defined.