I am disputing your claim that everyone would react in the same way to the same incentives/circumstances. I have cited this paper quite a few times because I think it offers a rigorous falsifiable claim for something I've observed informally, that being that there's a few distinctly different personality types that pursue quite different incentives, rather than everyone being pretty much the same. The key insight in the paper is summarized in figure 3; people tend to consistently be jerks, optimists, pessimists, or suckers in diminishing order of probability. It's a heavy read and not dispositive, but I've found it an extremely useful model.