Long term or short term, there's no counterfactual.
In the absence of a parallel universe or crystal ball, how would you know that the entities who seem to be winners after Brexit wouldn't have won twice over without Brexit? And how would you know that firms and economies that fall behind would have been more successful if "Remain" had won the day?
In the absence of a parallel universe or crystal ball, how would you know that the entities who seem to be winners after Brexit wouldn't have won twice over without Brexit? And how would you know that firms and economies that fall behind would have been more successful if "Remain" had won the day?