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by Retric 5079 days ago
The value of such a simple model is not what it directly tells you anything but when it stops working you have a strong hint that something interesting is going on. Suppose you find a town where the IQ is 7 points above what you would expect after accounting for the children's socioeconomic situation AND their parents IQ scores. Sounds interesting right, except without the proper weights you can't really do that analysis in the first place.