Earlier quoted context omitted.
There's a school of thought which holds that economics is a subset of psychology. I'd thought that this was reflected in some university departmental organisation, with M.I.T. being the one that came to mind. Despite there being a behavioural economics section there, though, so far as I'm aware Economics remains its own department. Kahneman's training and primary focus were both in psychology, but he was awarded the…
Psychology could legitimately be considered a subset of economics.
The counterargument to the proposition in my earlier post would be to show that there is economic activity which relies on nonhuman behaviours. Automated financial trading or AI-based management systems (financial, corporate, industrial, governmental, etc.) might be possible exceptions, which raises further interesting questions.