Marginal effects for coefficients of a beta regression

Question

I am fitting a beta regression using the betareg function in R. I would like to use a function like effect or margins to compute the marginal effects of the coefficients. However none of both of them actually work with this kind of model.

Does anybody know a function that works?

Answer 1

According to vignette("supported_models", package = "marginaleffects"), the marginaleffects package fully supports betareg models.

                                Numerical equivalence
Supported by marginaleffects    Stata     margins   emtrends
Package     Function            dY/dX SE  dY/dX SE  dY/dX SE
...
betareg     betareg               ✓    ✓    ✓    ✓    ✓   ✓ 

However, this table also says that betareg models are supported by margins::margins() and emmeans::emtrends(). Can you please give us a minimal reproducible example that shows the data and model you're fitting, and also shows the results you would want (e.g. by fitting an equivalent lm() to the same data)?