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Privacy and Market Concentration: Intended and Unintended Consequences of the GDPR

Author

Listed:
  • Garrett A. Johnson

    (Questrom School of Business, Boston University, Boston, Massachusetts 02215)

  • Scott K. Shriver

    (Leeds School of Business, University of Colorado–Boulder, Boulder, Colorado 80309)

  • Samuel G. Goldberg

    (Stanford Institute for Economic Policy Research, Stanford, California 94305)

Abstract

We show that websites’ vendor use falls after the European Union’s (EU’s) General Data Protection Regulation (GDPR), but that market concentration also increases among technology vendors that provide support services to websites. We collect panel data on the web technology vendors selected by more than 27,000 top websites internationally. The week after the GDPR’s enforcement, website use of web technology vendors falls by 15% for EU residents. Websites are relatively more likely to retain top vendors, which increases the concentration of the vendor market by 17%. Increased concentration predominantly arises among vendors that use personal data, such as cookies, and from the increased relative shares of Facebook and Google-owned vendors, but not from website consent requests. Although the aggregate changes in vendor use and vendor concentration dissipate by the end of 2018, we find that the GDPR impact persists in the advertising vendor category most scrutinized by regulators. Our findings shed light on potential explanations for the sudden drop and subsequent rebound in vendor usage.

Suggested Citation

  • Garrett A. Johnson & Scott K. Shriver & Samuel G. Goldberg, 2023. "Privacy and Market Concentration: Intended and Unintended Consequences of the GDPR," Management Science, INFORMS, vol. 69(10), pages 5695-5721, October.
    • Handle: RePEc:inm:ormnsc:v:69:y:2023:i:10:p:5695-5721
    DOI: 10.1287/mnsc.2023.4709
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