statsmodels.discrete.discrete_model.Poisson.loglikeobs

Poisson.loglikeobs(params)

Loglikelihood for observations of Poisson model

Parameters:params (array-like) – The parameters of the model. Returns:loglike – The log likelihood for each observation of the model evaluated at params. See Notes Return type:array-like

Notes

$$\ln L_{i}=\left[-\lambda_{i}+y_{i}x_{i}^{\prime}\beta-\ln y_{i}!\right]$$

for observations $i=1,...,n$