An interesting little note from Jeffrey Tucker in The Freeman:

It makes sense if you think about it. Mises was the great champion of subjectivist economic theory, with its radical observation that the whole shape of the world of economics is ultimately traceable to values residing in human minds. Freud did the same for the discipline of medicine and therapy. They both went beyond materialism to find explanatory power in how and what we think. Both highlighted the awesome power of the inner life of the individual mind.