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The Descriptive Validity of Prospect Theory
I don't think prospect theory is much descriptive, I think of it as a bunch of ideas. So they are valuable for one or two ideas that actually travels well and get completely detached from the rest of the theory. It turns out that in order to be able to state those ideas in a way that will influence thinking, you've got to pass a test of competence. Some ideas are more or less useful and that's the way I think about it.