statsmodels.genmod.families.family.NegativeBinomial.starting_mu

method

NegativeBinomial.starting_mu(y)

Starting value for mu in the IRLS algorithm.

Parameters

yarray

The untransformed response variable.

Returns

mu_0array

The first guess on the transformed response variable.

Notes

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

Only the Binomial family takes a different initial value.