Re: Hamilton's rule

in article dl2khd$2ijv$1@xxxxxxxxxxxxxxxxxxx, Perplexed in Peoria at
jimmenegay@xxxxxxxxxxxxx wrote on 11/11/05 9:31 AM:

> "Catherine Woodgold" <an588@xxxxxxxxxxxxxxxxxxx> wrote in message
> news:dl027h$1d1e$1@xxxxxxxxxxxxxxxxxxxxxx
>> Guy Hoelzer (hoelzer@xxxxxxx) writes:
>>> in article dkjvnh$1sna$1@xxxxxxxxxxxxxxxxxxx, Perplexed in Peoria at
>>> jimmenegay@xxxxxxxxxxxxx wrote on 11/5/05 8:10 PM:
>>>> But, following
>>>> Woodgold, we must also assume that there is a benefit c to a random
>>>> member of the population.
>>>
>>> OK, if you meant to say that there is a COST c experienced by other members
>>> of the population due to altruistic behavior, on average.
>>
>> No, a benefit. c is the cost to the donor. This cost is
>> balanced by its opposite, a benefit, that is experienced
>> by someone somewhere because the total population size is
>> assumed to remain constant.
>
> Thanks for catching this Catherine. Right. Using Catherine's 'gimmick',
> the cost c to the donor is balanced (for purposes of density-dependent
> population control) by an equal and opposite benefit c to a random member
> of the population. And the benefit b to the recipient is also balanced
> by a cost b to a random individual. I think that Guy understood the logic
> but thought I was labeling b as c because it is a cost (to the random
> member)

Thanks.

Actually, I didn't get it before, but I think it is clear now. I wish you
would help me further by answering the following question. Why would you
postulate that the compensatory effects ('benefit c' and 'cost b') are
experienced by 'a random individual' rather than diffusely spread among all
others in the population?

Guy


.

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