Aalen Additive Model

[pzivich]

Is your feature request related to a problem? Please describe.

In continuing expansion for survival data, one model to add is Aalen's additive hazard model. This can be structured as an estimating equation and gives some additional survival analysis support. It's not a super common model in the (epidemiology) literature, but it seems to have some uses.

Describe the solution you'd like

Add an ee_* for the Aalen additive hazard model

Describe alternatives you've considered

Don't provide an implementation, which limits the survival analysis tools provided in deli

Additional context

Some resources

https://pubmed.ncbi.nlm.nih.gov/12182121/

https://github.com/KenLi93/pci2s/blob/main/R/lin_ah.R#L115

[pzivich]

Also

https://www.med.uio.no/imb/english/research/groups/causal-inference-methods/software/addreg/aalen.html