The alternating prisoner's dilemma

Sigmund, K. & Nowak, M.A. (1994). The alternating prisoner's dilemma. Journal of Theoretical Biology 168 (2) 219-226. 10.1006/jtbi.1994.1101.

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Reciprocal altruism can often be modelled by a variant of the iterated Prisoner's Dilemma where players alternate in the roles of donor and recipient rather than acting simultaneously. We consider strategies realised by simple transition rules based in the previous encounter, and show that the evolutionary outcome for the alternating Prisoner's Dilemma can be quite different from the simultaneous case. In particular, the winner of a simultaneous Prisoner's Dilemma is frequently a "win-stay, lose-shift" strategy based on the payoff experienced in the last round, whereas in the alternating Prisoner's Dilemma, the trend leads towards a "Generous Tit For Tat" strategy. If one allows only for reactive strategies based on the other player's last move, the overall payoff is the same for the alernating or the simultaneous aversion, although the sequence of moves can be different. In the alternating game "win-stay, lose-shift" strategies can only be successful if there is a longer memory of past encounters. The alternating and simultaneous Prisoner's Dilemma are two vry different situations, and the whole existing literature is based on the simultaneous game.

Item Type: Article
Research Programs: Dynamic Systems (DYN)
Bibliographic Reference: Journal of Theoretical Biology; 168(2): 219-226 (Published online 24 April 2002) [May 1994]
Depositing User: IIASA Import
Date Deposited: 15 Jan 2016 02:03
Last Modified: 27 Aug 2021 17:35

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