They are among the most rational people you shall ever meet. And they are very aware of how incomplete their tools are. But they do a lot with such tools that is worth knowing.
This ignores so called Austrian economists however, who are just flat out lying to either themselves or everyone else depending on the person.
Multiple experiments are conducted using historic data, for example the 2024 Nobel.
But I have read NBER papers, and can confirm that there is real research. It's not a hard science, but among the social sciences it's pretty rigorous, and often very quantitative. I know how this crowd likes it quantitative.
All I know about them is that they don't like funny money, which to me as a systems thinker is perfectly reasonable. At worst you would expect it to be harmful, at best to obscure what is really going on.
'Austrian' economics is more akin to a religion, with associated dogma and moral tenets.
i think focusing on M0 is also incorrect. the debt money multiplier is a real phenomenon, and at least the psyche of a user of the banking system must be accounted for.
Individual Austrian-school economists sometimes make falsifiable predictions, and they are often (either knowably at the time or determined later) false, but that's a different issue, because, again, those predictions are not grounded (in the predictive sense; while they are in an emotive sense) in the fundamentals of the school in a way which would make falsifying them a “repudiation” for anyone at risk of adhering to the school in the first place.