and so this would have a large positive impact on the unskilled and skilled ray scheppach make sense. they are all unskilled. supposed the second number were large and the first number worst year. so all immigrants were skilled at they don't have exactly the opposite case. so there's one more example that turns out to be highly relevant. imagine if immigrants and natives were roughly equally unskilled and skilled. in the first ratio would be about the same as that second ratio and impact on the skill ration would be zero. in that case the labor market impact to immigration would be zero despite the fact immigration with potentially a large share of the workforce over all. more generally, what you would do is multiply this with the salt of the relative demand curve to get the which impact. this summer to the picture i showed you earlier. the problem with a picture earlier was it was oversimplified. just a point that nobody is rejecting supply today. that's a core product of economics. i'm going to reject that but it's just that very simple model with one type of worker is not adequate