January 31, 2013 . .
Observational studies have the same problem as poker, you have to play the cards you are dealt. This can be a problem when you expect people to responder differently to some variable according to some number of unobserved variables. While expectation-maximization probably won't help you in your weekly Texas Hold'em game, it can be an ace up your sleeve in data analysis.
dataMining EM R statistics regression simulation