I'm sorry, but Murray Rothbard is not taken seriously by the profession at this point. He has no economic model to speak of (he never modelized anything in a testable mathematical framework), and none of his claim were ever supported by econometric evidence.

His "analysis" harks back to economics of the 1800s, similar to Marx, where you would try to understand the economy by intuition, using nothing more than the english language. It turns out if you don't rigorously test your ideas you can use the english language to make a case for all sorts of loopy theories.