statsmodels.discrete.discrete_model.Poisson.loglikeobs¶

Poisson.loglikeobs(params)[source]¶

Loglikelihood for observations of Poisson model

Parameters:

params : array-like

The parameters of the model.

Returns:

loglike : ndarray (nobs,)

The log likelihood for each observation of the model evaluated at params. See Notes

Notes

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

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