Logit.
inverse_deriv
Derivative of the inverse of the logit transform
z : array-like
z is usually the linear predictor for a GLM or GEE model.
g’^(-1)(z) : array
The value of the derivative of the inverse of the logit function
statsmodels.genmod.families.links.Logit.inverse
statsmodels.genmod.families.links.NegativeBinomial