D&S researcher Alex Rosenblat and Ryan Calo’s recent work, The Taking Economy: Uber, Information, and Power, was profiled in this Fortune piece.

One part of the argument that stuck with me took Uber’s recentlycanceled cop-dodging Greyball program as its starting point. Rosenblat actually discovered “phantom cars” in the Uber app, à laGreyball, over the course of her investigations as early as two years ago. (Uber vehemently denied it then.) No one is quite sure how prevalent Uber’s ghost fleet is, but there’s reason to believe it’s more common than the company has let on.