NegativeBinomial.deriv()

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) : array The derivative of the negative binomial transform link function

Notes

g?(x) = 1/(x+alpha*x^2)