---
title: "Privacy rules and the small advertisers (research idea)"
description: "Privacy concerns, GDPR, data protection and consumer privacy appear on 81 recent papers, mostly about what consumers feel. Few study what the rules did to the firms that advertise. When tracking became harder, large platforms kept their data and small advertisers lost theirs. Did privacy rules raise concentration?"
url: https://scholar4ai.com/ideas/privacy-rules-and-small-advertisers
markdown_url: https://scholar4ai.com/ideas/privacy-rules-and-small-advertisers.md
license: CC BY-NC 4.0 (https://creativecommons.org/licenses/by-nc/4.0/)
share_text: "Privacy rules and the small advertisers (research idea): Privacy concerns, GDPR, data protection and consumer privacy appear on 81 recent papers, mostly about what consumers feel. Few study what the rules did to the firms that advertise."
date: "2026-10-23"
updated: "2026-10-23"
status: "seed"
tags: ["management", "marketing", "regulation"]
keywords: ["GDPR", "data protection", "privacy concerns", "consumer privacy"]
---

# Privacy rules and the small advertisers

Privacy concerns, GDPR, data protection and consumer privacy appear on 81 recent papers, mostly about what consumers feel. Few study what the rules did to the firms that advertise. When tracking became harder, large platforms kept their data and small advertisers lost theirs. Did privacy rules raise concentration?

## What prompted this

Since October 2025, 81 papers carry a GDPR, privacy-regulation, data-protection, cookie, app-tracking or consumer-privacy keyword (28 in management journals, 23 in AI, 12 in operations research, 11 in finance): "privacy concerns" on 32, "GDPR" on 9, "data protection" on 9, "consumer privacy" on 8. Thirty-three of them carry an advertising, marketing, targeting, competition or platform keyword, but almost none concerns the firms that buy advertising.

## Questions

- After app tracking restrictions and cookie consent rules, did small advertisers' customer acquisition costs rise more than large advertisers', and did some stop advertising online?
- Did the rules move advertising spending toward the platforms with the most first-party data?
- Did new firms find it harder to launch products, and did venture investment in consumer apps fall?

## Data that could help

Advertising spending by firm size from advertising platforms and panels, customer acquisition costs from e-commerce data providers, and the dates of privacy changes.

## Next step

Compare the advertising cost per acquisition of small and large e-commerce sellers before and after the 2021 app tracking change, using data from an e-commerce analytics provider.

## Related research activity

*The keywords this note follows, in the tracked finance, accounting, economics, management, operations research and AI journals as of 2026-10-26*

| Keyword | Papers, last 30 days | Rank | Papers per month, Oct 23 – Oct 26* | Papers, last 36 months |
|---|---:|---:|---|---:|
| GDPR | 1 | #2881 | 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 2, 0, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 1 | 12 |
| data protection | 0 | – | 0, 2, 2, 2, 2, 2, 0, 3, 1, 0, 1, 1, 0, 1, 2, 1, 4, 4, 2, 0, 0, 1, 0, 1, 1, 0, 1, 2, 0, 0, 2, 1, 1, 1, 1, 1, 0 | 43 |
| privacy concerns | 2 | #1303 | 0, 5, 3, 4, 0, 2, 3, 0, 2, 0, 3, 2, 3, 2, 4, 2, 3, 5, 2, 4, 4, 5, 1, 5, 3, 4, 2, 2, 3, 4, 4, 4, 3, 5, 7, 1, 2 | 106 |
| consumer privacy | 0 | – | 2, 0, 1, 0, 1, 1, 0, 1, 0, 2, 0, 0, 0, 2, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 3, 2, 0, 1, 2, 0, 0, 0, 1, 0, 2, 2, 0 | 27 |

## Cite this page

Scholar4AI. (2026). Privacy rules and the small advertisers. Journal Research Rankings. Retrieved October 23, 2026, from https://scholar4ai.com/ideas/privacy-rules-and-small-advertisers

```bibtex
@misc{scholar4ai-ideas-privacy-rules-and-small-advertisers,
  author = {{Scholar4AI}},
  title = {Privacy rules and the small advertisers},
  year = {2026},
  howpublished = {\url{https://scholar4ai.com/ideas/privacy-rules-and-small-advertisers}},
  urldate = {2026-10-23},
  note = {Journal Research Rankings; data from OpenAlex (CC0); licensed CC BY-NC 4.0}
}
```

License: CC BY-NC 4.0 (https://creativecommons.org/licenses/by-nc/4.0/).