The Identifiability of the Mixed Proportional Hazards Model with Time-Varying Coefficients
时变系数混合比例风险模型的可识别性
This paper establishes conditions for the nonparametric identifiability of the mixed proportional hazards model with time-varying coefficients. Unlike the mixed proportional hazards model, a regressor with two distinct values is not sufficient to identify this model. An unbounded regressor, however, is sufficient for identification.