You say you don't need a relevant PhD in order to dismiss the work of a learned Professor of Economics (and a Nobel Laureate to boot) as "bullshit"?
I beg to differ. You are clearly setting yourself up as a greater authority within the discipline than was the late Prof. Friedman and it is therefore imperative than you are able to show how far you have progressed within it. You have to at least hold the chair at a well-respected seat of learning and must have been honoured by your peers and international bodies.
So all you have to do is say where and when you were honoured in those various ways.
If you can't, there's only one appropriate way to label your post and that consists of one word (I'm sure that you can guess which one).
Why so coy, professor?
That's the word.