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Data is at the core of many of today’s successful business models. Here is an introductory list of the data and the companies behind them.

You probably assume Google and Facebook know everything about you. You may not have heard of a group of companies who possibly know even more. They’re called data brokers, and their business is collecting and selling personal data-typically without your knowledge or consent-that are used to verify identity, help marketers, detect fraud and help perform detailed “people searches.” Most people…

Read More at Quartz