this is a structural change, what you could do or the easiest thing would be to do was just to incorporate a dummy variable, right, if you incorporated a dummy variable to a erm  and to explain the  and to take out the effect of structural change, right, er in that dummy inclusive model, right, all the diagnostic test statistics were okay, right, you would use, you would, therefore, use that, that particular model  what we might do is just see if that is the case erm so if you come out of er diagnostics, work towards the data processing environment and generate a dummy variable  right, so if you go into the erm data processing environment  if it's in the er sort of process plot  option  what we'll do create a dummy variable call it d and let d pull zero press the return key and then edit  d oh and if you just set erm observations for