Agent sophistication may not even be well defined. One cannot smoothly track behavior from optimizing to myopic. Intelligence, sophistication, whatever we want to call it, is more than one-dimensional and may not be easily “dialed in.” However, within any one class of rules, often there does exist a dial. We can make the rules within a given class more “intelligent” by, say, varying the number of past periods remembered or future periods forecasted. We might also be able to move between classes of rules where one class embodies more intelligence than the other. One key question is when does
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