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Academic who collected 50 million Facebook profiles: ‘We thought we were doing something normal’ - The Verge

Academic who collected 50 million Facebook profiles: ‘We thought we were doing something normal’ - The Verge: Speaking to Radio 4, Kogan echoed these sentiments, saying Cambridge Analytica had tried to sell “magic” but that its efforts “could have only hurt [Trump’s] campaign.”

“The accuracy of this data has been extremely exaggerated,” said Kogan. “In practice my best guess is that we were six times more likely to get everything wrong about a person as we were to get everything right about a person. I personally don’t think micro-targeting is an effective way to use such datasets.”