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Searchers on the blogosphere often have a need to identify other key bloggers with similar interests to their own. However, a main difference of this blog distillation task from normal adhoc or Web document retrieval is that each blog can be seen as an aggregate of its constituent posts. On the other hand, we show that the task is similar to the expert search task, where a person's expertise is derived from the aggregate of their publications or emails. In this paper, we investigate severaldoi:10.1145/1458082.1458221 dblp:conf/cikm/MacdonaldO08 fatcat:p26mttd7o5cfhpxmhwhi6ni4x4