David Sparks Evans is an American economist specializing in antitrust and two-sided markets. He is the chairman of Global Economics, Inc., and founding editor of Competition Policy International. He teaches at the University College London, where he is the co-executive director of the Jevons Institute for Competition Law and Economics, and at the University of Chicago Law School.

Previously, Evans was the founder of Market Platform Dynamics and the former head of the global competition policy practice at LECG, LLC. He previously taught at the department of economics and law school at Fordham University.

Evans focuses on business strategy and competition policy, particularly in high-technology and multi-sided platform businesses, such as payments, software, and digital media. His most recent book is Catalyst Code (with Richard L. Schmalensee), which deals with the management problems faced by multi-sided businesses.