betareg/enriched_betaregFunction to compute/extract a function that returns the first term
in the expansion of the bias of the MLE for the parameters of an
object of class betareg/enriched_betareg
# S3 method for betareg
get_bias_function(object, ...)an object of class betareg orenriched_betareg
currently not used
The computed/extracted function has arguments
the regression coefficients at which the first-order bias is evacuated. If missing then the maximum likelihood estimates are used