Looking at Gaining Advantage from Proprietary Data

What is “free” vs. “expensive” data collected by corporations? In this Wall Street Journal article we remove our illusions of personal privacy. What privacy?  No such thing any more… advocate for MIT Media Lab’s Alex “Sandy” Pentland’s New Deal on Data (but that’s a different article).  In this article, the authors, Thomas H. Davenport and Thomas Redman, discuss the difference