Unbelievable is right. But then again look at who this unbelievable economist is advising, an even more unbelievable president. If unbelievability is relative, he probably looks quite believable through the eyes of the Biden!
The guy does have an air of superiority which is convincing to one heck of a lot of people. Whenever I see him on a panel or sitting for an interview, I know it will not go well.