In this paper I describe some substantial extensions to the
survsim command for simulating survival data.
survsim can now simulate survival data from a parametric distribution, a custom/user-defined distribution, from a fitted
merlin model, from a specified cause-specific hazards competing risks model, or from a specified general multi-state model. I illustrate the command with some examples from each setting, demonstrating the huge flexibilty that can be used to better evaluate statistical methods.