Wei_Dai comments on Open Thread: June 2010 - Less Wrong

5 Post author: Morendil 01 June 2010 06:04PM

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Comment author: Vladimir_Nesov 01 June 2010 10:11:03PM *  4 points [-]

What would happen in such a world?

Classical game theorists establish a scientific consensus that the only rational course of action is not to push the buttons. Anyone who does is regarded with contempt or pity and gets lowered in the social stratum, before finally managing to rationalize the idea out of conscious attention, with the help of the instinct to conformity. A few free-riders smugly teach the remaining naive pushers a bitter lesson, only to stop receiving the benefit. Everyone gets back to business as usual, crazy people spinning the wheels of a mad world.

Comment author: Wei_Dai 02 June 2010 04:15:17AM 6 points [-]

Are you saying that classical game theorists would model the button-pushing game as one-shot PD? Why would they fail to notice the repetitive nature of the game?

Comment author: khafra 02 June 2010 01:37:51PM 2 points [-]

I'd be far more willing to believe in game theorists calling for defection on the iterated PD than in mathematicians steering mainstream culture.

However, with the positive-sum nature of this game, I'd expect theorists to go with Schelling instead of Nash; and then be completely disregarded by the general public who categorize it under "physical ways of causing pleasure" and put sexual taboos on it.

Comment author: Vladimir_Nesov 02 June 2010 08:58:19AM *  1 point [-]

The theory says to defect in the iterated dilemma as well (under some assumptions).

Comment author: cousin_it 02 June 2010 12:18:05PM *  3 points [-]

Here's what the theory actually says: if you know the number of iterations exactly, it's a Nash equilibrium for both to defect on all iterations. But if you know the chance that this iteration will be the last, and this chance isn't too high (e.g. below 1/3, can't be bothered to give an exact value right now), it's a Nash equilibrium for both to cooperate as long as the opponent has cooperated on previous iterations.