Firms and the fuzz use big data and Facebook to catch crooks and customers

Companies can spot … influencers, and work out all sorts of other things about their customers, by crunching vast quantities of calling data with sophisticated “network analysis” software… The market for such software is booming. By one estimate there are more than 100 programs for network analysis, also known as link analysis or predictive analysis. The raw data used may extend far beyond phone records to encompass information available from private and governmental entities, and internet sources such as Facebook.

• The Economist: Mining social networks: Untangling the social web

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