After the estimation of nested logit using mlogit in R, I need to estimate the marginal effect or elasticity for each alternative levels of the covariates against the reference. Pls I would appreciate if anyone can help with the code.
I'm not sure I understand the question, but are looking for something like emmeans? It looks like mlogit isn't supported ( https://cran.r-project.org/web/packages/emmeans/vignettes/models.html ), but another, supported package might work for you.