From the abstract: "This paper presents a review of research on blogs and blogging within the social sciences and the humanities. It attempts to map out what kind of research has been conducted, how it has been performed and what gaps that might need to be filled. Specifically, the paper will analyze all articles on blogs and blogging indexed by the ISI Web of Knowledge." After an interesting paper, the authors conclude "a typical blog research article is a sociological or psychological, empirical study that use and carefully describe a quantitative method. It is aimed at the organizational level of study and focuses on blogs or bloggers as the sole units of analysis." I find it interesting to note that if you simply publish your own opinion, that's non-empirical, but if you gather other people's opinions, count them, and publish the number, that's empirical.