[R] Estimating Endogenous Selection Model

[Johannes Muck]

Dear all,

I want to estimate a model in which individuals self-select into two
different actions (e.g. invest or not invest). Moreover, the factors that
influence the selection decision also affect the ultimate outcome variable
(e.g. return on investment). That is, I want to estimate a model with
endogenous selection.

My question is: Which R package supports this kind of estimation? 
To me it seems like the package sampleSelection
(https://cran.r-project.org/web/packages/sampleSelection/sampleSelection.pdf
) can only be used in case of a SAMPLE selection, i.e. in the example above:
only individuals that invest are observed. Yet in my case, both actions are
observed but the decision which action to choose is endogenous. Or does this
package also support self-selection models?

Thank you very much in advance.

Best,

Johannes