Background: His claim is that all of our CPI calculations are wrong bc we should be using gauge theory rather than differential calculus to understand consumer utility.
He got invited to the University of Chicago to give a talk about this theory. (This is one of the world’s top three or four economics departments.)
While I was not personally there, I have read reports about what happened. He was repeatedly asked by people in the room to provide a simple example of a case where his theory would do better than current methods for calculating CPI: suppose there are two goods and two periods of time, e.g. Show us how we get it wrong and you get it right (and why)
He did not do this. It seemed (according to reports from the room) that he was unable to do so.
It seems (being charitable) like the guy has a habit of making dramatic claims like “I have solved X and everyone currently working on it has it wrong!” and then not being able (not remotely able!) to back it up.