A few days ago I posted a preprint of a methodological paper in which I examine the potential value of a new measure grounded in information theory called ‘transfer entropy’ for analyzing observational epidemiological data (Transfer entropy as a tool for inferring causality from observational studies in epidemiology. ). I posted it on ‘bioRxiv’ (dubbed ‘The Preprint Server for Biology’ by the makers) which is a new website very similar to ‘arxiv’ but with a focus on life sciences. I think that the paper needs more polishing for final publication, so please feel free to comment! That is the whole idea behind publishing preprint: To allow peers to review a piece before it gets eternalized.