statsmodels.genmod.families.links.NegativeBinomial.deriv¶

NegativeBinomial.deriv(p)[source]¶

Derivative of the negative binomial transform

Parameters:	p (array-like) – Mean parameters
Returns:	g’(p) – The derivative of the negative binomial transform link function
Return type:	array

Notes

g’(x) = 1/(x+alpha*x^2)