statsmodels.genmod.families.family.NegativeBinomial.starting_mu

NegativeBinomial.starting_mu(y)

Starting value for mu in the IRLS algorithm.

Parameters:y (array) – The untransformed response variable. Returns:mu_0 – The first guess on the transformed response variable. Return type:array

Notes

\[\mu_0 = (Y + \overline{Y})/2\]

Only the Binomial family takes a different initial value.