BIOL 3062 Lecture Notes - Lecture 19: Evolutionarily Stable Strategy, Snowdrift
1 May 2017
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Get biggest immediate gain/payoff by cooperating: biggest payoff from cooperating. Donor deciding whether to cooperate: compatriot also will help if you do. Need to dig out cars to get to university: can help house mate to dig out car or just sleep in, or just sleep in and not deal with costs of helping. Intuition says to go out and both get the car out so as a whole, both individuals are better off: even though would be better off free-loading from an individual. See reciprocity in behaviour: less likely to show altruistic behaviour towards those who do not reciprocate, when there is no back-and-forth, altruist stops doing favours. When one always defects, there is not selection for altruistic behaviour: best to both defect if the first individual does, once one individual defects, it is most beneficial for other to defect.
