Specifies which  of the regressors that lead to 
proportional excess hazard

survival

Programs for Martinussen and Scheike (2006), `Dynamic Regression
    Models for Survival Data', Springer Verlag.  Plus more recent developments.
    Additive survival model, semiparametric proportional odds model, fast cumulative
    residuals, excess risk models and more. Flexible competing risks regression
    including GOF-tests. Two-stage frailty modelling. 
    PLS for the additive risk model. Lasso in ahaz package.

cox: Identifies proportional excess terms of model

Description

Arguments