Brokers Trade on Sensitive Medical Data with Little Oversight, Senate Says

... the digital age. An industry which began in the 1970s collecting data from public records to help marketers send direct mail has become an engine of a global $120 billion digital-advertising industry, helping marketers deliver increasingly targeted ...

http://blogs.wsj.com/digits/2013/12/18/brokers-trade-on-sensitive-medical-data-with-little-oversight-senate-says/?mod=WSJBlog&mod=WSJ_FinancingAndInvesting_BLOGSDIGITALDAILY