I would like to see sequences of top level postings providing semi-technical tutorials on topics of interest to rationalists.
As one example of a topic: Game Theory
Actually, there is material here for several sequences, dealing with several sub-topics. We need a sequence on games with incomplete information, on iterated games, on two-person cooperative games (we have a couple articles already, but we haven't yet covered Nash's 1953 paper with threats), and on multi-person cooperative games (Shapley value, Core, Nucleolus, and all that).
I've studied game theory and rationality, and I don't use game theory even when applying rationality to game design! I've used some of the nontechnical results (threats, from Shelling's book) to negotiate and precommit but that's about it. Has someone else used game theory in real life?
Unless someone else responds to this comment, my guess is that this topic is of greater interest to readers than it is of any use.
Are there any areas of study that you feel are underrepresented here, and would be interesting and useful to lesswrongers?
I feel some topics are getting old (Omega, drama about moderation policy, a newcomer telling us our lack of admiration for his ideas is proof of groupthink, Friendly AI, Cryonics, Epistemic vs. Instrumental Rationality, lamenting how we're a bunch of self-centered nerds, etc. ...), and with a bit of luck, we might have some lurkers that are knowledgeable about interesting areas, and didn't think they could contribute.
Please stick to one topic per comment, so that highly-upvoted topics stand out more clearly.