I’m thinking of using this space to answer or comment on questions I often get about econometrics. When I receive questions via e-mail I try to answer as many as possible — but I don’t always have the time. Sometimes I think I’m answering similar questions from different people. I’m thinking of trying an experiment where I post answers to questions in this space. I’m not sure how it will go, as I cannot easily use equations — at least I don’t know how to yet.