Guy Aridor

About Me

I am an Assistant Professor of Marketing at Northwestern Kellogg School of Management. I am mainly interested in understanding competition and regulatory issues in the digital economy as well as more broadly the societal impacts of digital technologies. My research uses tools from empirical industrial organization, experimental methodologies, and applied microeconomic theory in order to shed light on these questions. I am also affiliated with the CESifo Research Network.

Previously, I got my PhD in Economics at Columbia University and a B.A. in computer science, pure/applied mathematics, and economics from Boston University. Before my PhD I spent a couple of years as a software engineer at HubSpot where I worked on a bunch of fun stuff, including product experimentation tools and scaling products.

Links: CV, Google Scholar, Github
Working Papers
  1. Market Definition in the Attention Economy: An Experimental Approach.
    • Revision Requested (Second Round), RAND Journal of Economics; Extended Abstract at EC'23
    • Full Paper: PDF, SSRN, CESifo, Last Updated: October 2023
  2. Privacy Regulation and Targeted Advertising: Evidence from Apple's App Tracking Transparency. Joint work with Yeon-Koo Che.
  3. The Economics of Social Media. Joint work with Rafael Jimenez, Ro'ee Levy, Lena Song.
    • Revision Requested, Journal of Economic Literature
    • Full Paper: PDF, SSRN, CEPR, Last Updated: January 2024
  4. The Economics of Recommender Systems: Evidence from a Field Experiment on MovieLens. Joint work with Duarte Goncalves, Ruoyan Kong, Daniel Kluver, Joseph Konstan.
    • Extended Abstract at EC'23
    • Full Paper: PDF, arXiv, CESifo, Last Updated: November 2022
  5. Competing Bandits: The Perils of Exploration under Competition. Joint work with Yishay Mansour, Alex Slivkins, Steven Wu.
    • Extended Abstract at EC'19
    • Full Paper: PDF, arXiv, Last Updated: December 2022
  1. Deconstructing the Filter Bubble: User Decision-Making and Recommender Systems. Joint work with Duarte Goncalves, Shan Sikdar.
    • Proceedings of the 14th ACM Conference on Recommender Systems (RecSys '20)
    • Full Paper: Publisher Version
  2. Recommenders' Originals: The Welfare Effects of the Dual Role of Platforms as Producers and Recommender Systems. Joint work with Duarte Goncalves.
  3. The Effect of Privacy Regulation on the Data Industry: Empirical Evidence from GDPR. Joint work with Yeon-Koo Che, Tobias Salz.
    • RAND Journal of Economics (2023); Extended Abstract at EC'21
    • Full Paper: Publisher Version
  4. Information-Constrained Coordination of Economic Behavior. Joint work with Rava Azeredo da Silveira, Michael Woodford.
    • Journal of Economic Dynamics and Control (Accepted)
    • Full paper: NBER
Work in Progress
  1. The Welfare Implications of Privacy Online. Joint work with Sam Goldberg.
Recorded Presentations
Press, Blogs, and Other Mentions