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Jeff Hammerbacher, a research scientist at Facebook, is giving a presentation at Yahoo today about large-scale data analysis. The Harvard grad's prior experience before coming to Facebook? Developing price models for mortgage-backed securities at Bear Stearns — the same kind of securities that led Bear to write off $1.9 billion in December. Does this explain why Facebook is sending him to give a talk at a competitor? Take note, Yahoos. (Photo by jakob)