def METHOD_NAME():
    data = generate_data(
        0, datatype="numpy", const=False, other_effects=1, ntk=(25, 200, 5)
    )
    for i in range(0, data.x.shape[1], 7):
        data.x[1, i, :] = data.x[0, i, :]
    mod = FamaMacBeth(data.y, data.x)
    res = mod.fit()
    assert np.any(np.isnan(res.all_params))