got a very low test statistic either in terms of kie or f right so we haven't reached  but the model is still a poor model because we don't have erm er stable parameters, right, so you would actually reject this model as it stands, alright, because it didn't pass the diagnostic test statistics but there is no point generating parameters w if they, if they are not constant and you're gonna say  elastic demand is  one point four six or really it it's ranged between minus three  plus, plus six over the sample, so you put estimate means  so it must have constant parameters.