This ‘economist’ that is quoted sounds like a real nut job
The EU is collapsing, and it would be stupid for Serbia to join. It would be like rowing out to the Titanic and hopping aboard
There are plenty of non-EU members which Serbia can trade with (Switzerland, Norway, Iceland, non-EU former Eastern Bloc) who are not economic basket-cases like the EU currently is
Like I always said...they don’t “need no steenkin” EU.