Guy Aridor is an assistant professor of marketing at the Kellogg School of Management at Northwestern University. He holds a PhD in Economics from Columbia University. He studies questions regarding consumer privacy, recommendation systems, and social media with a particular interest in policy and antitrust issues in these spaces. His work is published or forthcoming in several venues in economics, marketing, and computer science, including the RAND Journal of Economics, Management Science, the Journal of Economic Literature, and the Proceedings of the ACM Conference on Recommender Systems. Before his PhD he worked as a software engineer at HubSpot focusing on growth engineering and developing marketing automation tools.