lecture 10 - Fighting and Assessment ESS: Evolutionarily...

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Fighting and Assessment ESS: Evolutionarily Stable Strategy Game theory for decision making Cost of display Cost of fight Value of resource Dung Fly War of attrition Walnut Husk Fly Sequential Assessment
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ESS A strategy is an ESS if, when adopted by most individuals of a population, it cannot be invaded by the spread of any rare alternative strategy.
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Components and assumptions of an ESS model The strategy set The payoff matrix The assumption of equal payoffs for each strategy
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Symmetrical Contests Hawks vs. Doves 2 potential outcomes Escalation to Fighting Amicable Agreement What is the ESS when this is the case?
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Strategy Set Not actual hawks and doves….these are the names of the strategies Hawk (H) -- fight at escalated level, retreat only if injured. Dove (D) -- retreat immediately if opponent escalates, otherwise settle quickly without escalation (flip a coin). This is a conventional settlement.
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V = value of winning
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This note was uploaded on 02/27/2010 for the course ENTOMOLOGY ent 104 taught by Professor Edwinlewis during the Spring '10 term at UC Davis.

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lecture 10 - Fighting and Assessment ESS: Evolutionarily...

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