What if? This question comes up again and again. But politically, one question is not coming up at the moment: What if the EU were to dissolve? But research is free, fortunately. And it is thus allowed to answer questions no one has asked in this form. This is why the renowned economists Gabriel Felbermayr, Jasmin Gröschl, and Inga Heiland have calculated seven scenarios for the Ifo Institute, although they have to emphasize three times that the scenarios are counterfactual.