I don't deny that he is smart, but he is still out of his depth here. Really, no one cares what his credentials might be, true or false, only his arguments matter here. So far, I find his arguments sorely lacking in substance or merit. His economic writings are bullshit.
Why do you think they are bullshit? I read them multiple times and I came to the opposite conclusion.
Seems to me that he is not out of his league at all in fact I think he is holding his own rather well.