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X12 is used by the US government and TRAMO-SEATS by EU governments. Is there any major organisation that uses STL?
Since X12 is more widely known than STL, I would like some supporting arguments that STL is as good as X12, apart from some numerical experiments I can run myself.
I do not have argument supporting STL, only one for X12.
In X12 there are usually non-linear filters removing outliers before other procedures are done. This is thought to improve seasonal adjustment process.
