Vladimir_Nesov comments on Information cascades - Less Wrong

48 Post author: Johnicholas 06 March 2009 04:08AM

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Tags: information_cascade use_likelihoods

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Comment author: Vladimir_Nesov 06 March 2009 11:25:48AM *  0 points [-]

Let's talk about how the very first reader would vote. If they judged the post high quality, then they would multiply the prior likelihood ratio (6:4) times the bayes factor for a high private signal (4:1), get (6 * 4:4 * 1) = (6:1) and vote the post up.

Voting is a decision, so you need utility in order to go from 6:1 to "vote up".

Comment author: Johnicholas 06 March 2009 01:10:18PM 1 point [-]

I agree. I should have said something about it, but at that point I'm using the assumption "Voters strive to vote the true quality of the post."

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