Garrett Johnson
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garjoh.bsky.social
Garrett Johnson
@garjoh.bsky.social
1.4K followers 1.1K following 120 posts
Marketing professor @BUQuestrom researching digital marketing: privacy & ad effectiveness. 🇨🇦,🇺🇸. garjoh.com
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garjoh.bsky.social
The piece cites our research on the impact of privacy regulation on made-for-kids content on YouTube. This work with @tesary.bsky.social, Liang Zhong, & James Cooper was recently accepted at Management Science. 2/2
threadreaderapp.com/thread/17379...
Thread by @garjoh_canuck on Thread Reader App
@garjoh_canuck: 🚨Working paper update!🚨 What is the impact of strict #privacy regulation on content supply and demand? In Sept 2019, YouTube paid a record $170M to settle charges it violated children’...
threadreaderapp.com
November 18, 2025 at 2:23 AM
garjoh.bsky.social
Notably, Chrome announces its support of the W3C’s proposed interoperable Attribution standard.

In sum, PETs lives on in advertising, but are focused on measurement rather than targeting.
October 17, 2025 at 12:30 PM
Reposted by Garrett Johnson
aaronsojourner.org
Janet Yellen's husband & Econ Nobel Laureate George Akerlof:

"...when presidents flip the board, it’s not just a game that ends. It’s the pieces of democracy that get scattered to the floor."
www.nytimes.com/2025/08/03/o...
Imagine a group of 5-year-olds playing a board game. The rules are clear, the goal is fair, and one child edges ahead — until, suddenly, another child starts losing. That’s when the trouble begins. “He cheated!” the losing child yells. “I’m the winner anyway!” he declares. And then, like clockwork, he flips the board. In the world of kindergarten conflict resolution, we expect this kind of behavior. We chalk it up to development. We teach better sportsmanship. What do we do when the president of the United States behaves this way? On Friday, President Trump fired the head of the Bureau of Labor Statistics — the nation’s workaday scorekeeper of employment, wages and productivity. Why? Because the data didn’t make Mr. Trump look good. The statistics were inconvenient. So the president didn’t just challenge the findings; he fired the statistician. That’s not governing. That’s board flipping.
August 3, 2025 at 5:56 PM
garjoh.bsky.social
PS On a more optimistic note, we have related research with 2K+ advertisers that shows Sandbox retained 82–93% of advertiser outcomes on a per-dollar or per-impression basis.
www.linkedin.com/pulse/privac...
Privacy-Enhanced versus Traditional Retargeting: Ad Effectiveness in an Industry-Wide Field Experiment
💡Imagine a world 🌎 where ads respect your privacy and still work! 🚫🍪 🚨Our latest research dives into Google’s Privacy Sandbox, which tries to make this happen. Here’s what we learn from an experiment ...
www.linkedin.com
June 9, 2025 at 3:50 PM
garjoh.bsky.social
10/ 📝 Paper: "Can Privacy Technologies Replace Cookies? Ad Revenue in a Field Experiment"
By Zhengrong Gu, myself, & @sjkobayashi
ssrn.com/abstract=528...
Let us know what you think. Questions welcome!
Can Privacy Technologies Replace Cookies? Ad Revenue in a Field Experiment
As regulators seek to balance user privacy with publisher sustainability, Google's Privacy Sandbox offers a potential replacement for third-party cookies. This
ssrn.com
June 9, 2025 at 3:50 PM
garjoh.bsky.social
9/ 🇪🇺 Notably, the EU faces greater regulatory pressure under #GDPR.
➡️EU has more impressions without cookies (43%) and experiences greater revenue losses when cookies are removed (-66%).
➡️Sandbox performs better in the EU: recovering 22% of lost revenue.
Table 8: Treatment Effect Estimates: Country Heterogeneity
June 9, 2025 at 3:50 PM