def __init__(self, endog, exog, smoothers=None, family=families.Gaussian()):
#self.family = family
#TODO: inconsistent super __init__
AdditiveModel.__init__(self, exog, smoothers=smoothers, family=family)
GLM.__init__(self, endog, exog, family=family)
assert self.family is family #make sure we got the right family
