MixedLM.
get_fe_params
Use GLS to update the fixed effects parameter estimates.
cov_re : array-like
The covariance matrix of the random effects.
The GLS estimates of the fixed effects parameters.
statsmodels.regression.mixed_linear_model.MixedLM.from_formula
statsmodels.regression.mixed_linear_model.MixedLM.get_scale