This reminds me of Ramana’s question about what “enforces” normativity. The question immediately brought me back to a Peter Railton introductory lecture I saw (though I may be misremembering / misunderstanding / misquoting, it was a long time ago). He was saying that real normativity is not like the old Windows solitaire game, where if you try to move a card on top of another card illegally it will just prevent you, snapping the card back to where it was before. Systems like that plausibly have no normativity to them, when you have to follow the rules. In a way the whole point of normativity is that it is not enforced; if it were, it wouldn’t be normative.
I’m reminded of trembling-hand equilibria. Nash equilibria don’t have to be self-enforcing; there can be tied-expectation actions which nonetheless simply aren’t taken, so that agents could rationally move away from the equilibrium. Trembling-hand captures the idea that all actions have to have some probability (but some might be vanishingly small). Think of it as a very shallow model of where norm-violations come from: they’re just random!
Evolutionarily stable strategies are perhaps an even better model of this, with self-enforcement being baked into the notion of equilibrium: stable strategies are those which cannot be invaded by alternate strategies.
Neither of these capture the case where the norms are frequently violated, however.
I’m reminded of trembling-hand equilibria. Nash equilibria don’t have to be self-enforcing; there can be tied-expectation actions which nonetheless simply aren’t taken, so that agents could rationally move away from the equilibrium. Trembling-hand captures the idea that all actions have to have some probability (but some might be vanishingly small). Think of it as a very shallow model of where norm-violations come from: they’re just random!
Evolutionarily stable strategies are perhaps an even better model of this, with self-enforcement being baked into the notion of equilibrium: stable strategies are those which cannot be invaded by alternate strategies.
Neither of these capture the case where the norms are frequently violated, however.