statsmodels.discrete.discrete_model.Poisson.score_factor

Poisson.score_factor(params)[source]

Poisson model score_factor for each observation

Parameters:
paramsarray_like

The parameters of the model

Returns:
scorearray_like

The score factor (nobs, ) of the model evaluated at params

Notes

\[\frac{\partial\ln L_{i}}{\partial\beta}=\left(y_{i}-\lambda_{i}\right)\]

for observations \(i=1,...,n\)

where the loglinear model is assumed

\[\ln\lambda_{i}=x_{i}\beta\]

Last update: Feb 28, 2024