Article Antitrust and the Robo-Seller: Competition in the Time of Algorithms Salil K. Mehra† INTRODUCTION Disruptive innovation can turn users into newly-minted economists. Consider the controversial practice of “surge pric- ing” enabled by the ride-sharing service Uber.1 Confronted on occasions such as New Year’s Eve by prices six to seven times as much as normal, users tend to ask for an explanation. On the one hand, surge pricing resembles basic market econom- ics—many people want a ride, market demand pushes the price up, and those higher prices attract more drivers until the price falls to a new level.2 But as Uber’s own marketing recognizes, this is a market whose price signals act within a proprietary † Professor of Law, Temple University, James E. Beasley School of Law.
[email protected]. The author wishes to thank Greg Mandel, Jeff Vagle, Polk Wagner, Harwell Wells, and Chris Yoo for their comments, as well as participants at workshops and conferences at the University of St. Gallen, Bournemouth University and the University of Pennsylvania. Thanks also to Dylan Taylor for research assistance and Sarah Mehra for editing help. Copy- right © 2016 by Salil K. Mehra. 1. See Eric Posner, Why Uber Will—and Should—Be Regulated, SLATE (Jan. 5, 2015, 2:49 PM), http://www.slate.com/articles/news_and_politics/view_ from_chicago/2015/01/uber_surge_pricing_federal_regulation_over_taxis_and_ car_ride_services.single.html (endorsing arguments for regulation of surge pricing, Uber’s term for raising prices at times of higher demand); Ilya Somin, Surge Pricing and Political Ignorance, WASH. POST: VOLOKH CONSPIRACY (Dec.