A colleague told me that he got a useful research idea from StatRetro the other day, so I wanted to plug it again:

StatRetro is a twitter feed with old posts from the Statistical Modeling, Causal Inference, and Social Science blog from 2004 to now, in chronological order, tweeted every 8 hours. It’s now in May 2007. Lots of great stuff, including for example this post, “Happiness, children, and the difficulties of trying to answer Why-type questions,” which anticipated my paper with Guido from several years later, “Why ask why? Forward causal inference and reverse causal questions.”

Three posts a day! Enjoy.