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Simpson’s paradox was discussed thoroughly in the article (paper?) by Kievit et. al. that I read for class today.  Although I have been introduced to this topic before, I did not know the term for it and didn’t know how prevalent it is.  The study about the likelihood of SP in simulated data was fascinating – 1.67% of simulated cases saw the “complementary subpopulations show a sign opposite to the aggregate”.  I will absolutely be more on the lookout for Simpson’s paradox in every interpretation of data I come across.

In response to “strategies in prisoners dilemma games” , kdomjan writes, “it’s interesting that they put this under psychology, when it’s most commonly recognized as an econ term (as far as I know)”.

While prisoners dilemma is absolutely a hypothetical to show incentives, it can also be analyzed from a psychological perspective.  For example, when put into practice, why do some people not make the “optimal decision”?