steven0461 comments on You're Calling *Who* A Cult Leader? - Less Wrong

45 Post author: Eliezer_Yudkowsky 22 March 2009 06:57AM

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Comment author: Anatoly_Vorobey 22 March 2009 01:42:56PM 8 points [-]

how people split up their money among many different charities to, as they put it, "maximize the effect", even though someone with this goal should donate everything to the single highest-utility charity.

If I have complete or near-complete trust in the information available to me about the charity's utility, as well as its short-term sustainability, that seems like the right decision to make.

But if I don't - if I'm inclined to treat data on overhead and estimates of utility as very noisy sources of data, out of skepticism or experience - is it irrational to prefer several baskets?

Similarly with knowledge and following reading lists, ideologies and the like.

Comment author: steven0461 22 March 2009 02:27:41PM *  9 points [-]

But if I don't - if I'm inclined to treat data on overhead and estimates of utility as very noisy sources of data, out of skepticism or experience - is it irrational to prefer several baskets?

Very much so. Rational behavior is to maximize expected utility. When rational agents are risk-averse, they are risk-averse with respect to something that suffers from diminishing returns in utility, so that the possibility of negative surprises outweighs the possibility of positive surprises. "Time spent reading material from good sources" is a plausible example of something that has diminishing returns in utility so you want to spread it among baskets. Utility itself does not suffer from diminishing returns in utility. (Support to a charity might, but only if it's large relative to the charity. Or large relative to the things the charity might be doing to solve the problem it's trying to solve, I guess.)