'Tests Poisson family with canonical log link.'

@classmethod
def setup_class(cls):

    super(TestWtdGlmPoissonHC0, cls).setup_class()
    start_params = np.array([0.000182794424, (-0.0476785037), (-0.0948249717), (-0.000292293226), 2.63728909, (-20.5934384)])
    fit_kwds = dict(cov_type='HC0')
    cls.res1 = GLM(cls.endog, cls.exog, freq_weights=cls.weight, family=sm.families.Poisson()).fit(**fit_kwds)
    fit_kwds = dict(cov_type='HC0', start_params=start_params)
    cls.res2 = GLM(cls.endog_big, cls.exog_big, family=sm.families.Poisson()).fit(**fit_kwds)
