### The reliability of penalized models in survival analysis. Using the value first deritative parametrization in the penalized likelihood framework

Ronny Westerman, Katharina Belting & Ulrich Mueller
Introduction: In Survival analysis the parametric assumption seems to be too restrictive for many practical applications. Nonparametric techniques will be often seen as an alternative to overcome such problems in limitations. The motivation using penalized splines (P-splines) yields on the compromise[for full text, please go to the a.m. URL]