This paper applies the semi-parametric Cox regression approach to model unemployment duration in five Central and Eastern European countries. The Cox proportional hazards models and the Cox regression models with a time-dependent covariate are developed, and the results are interpreted and...

We develop tests of the proportional hazards assumption, with respect to a continuous covariate, in the presence of unobserved heterogeneity with unknown distribution at the individual observation level. The proposed tests are specially powerful against ordered alternatives useful for modeling...

This study focuses on dynamic changes in survival probabilities over the lifetimes of hedge funds. To model such probabilities, a mixed Cox proportional hazards (CPH) model-specifically, a survival/hazard model with time-varying covariates and fixed covariates- is employed. Resulting dynamic...