Garrett Johnson
@garjoh.bsky.social
Marketing professor @BUQuestrom researching digital marketing: privacy & ad effectiveness. 🇨🇦,🇺🇸. garjoh.com
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.
In sum, PETs lives on in advertising, but are focused on measurement rather than targeting.
October 17, 2025 at 12:30 PM
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.
In sum, PETs lives on in advertising, but are focused on measurement rather than targeting.
Reposted by Garrett Johnson
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...
"...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...
August 3, 2025 at 5:56 PM
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...
"...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...
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...
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
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...
www.linkedin.com/pulse/privac...
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!
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
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!
By Zhengrong Gu, myself, & @sjkobayashi
ssrn.com/abstract=528...
Let us know what you think. Questions welcome!
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.
➡️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.
June 9, 2025 at 3:50 PM
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.
➡️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.
8/ 🕛 Second: latency. On-device auctions are slow.
The 75th percentile ad latency under Privacy Sandbox is 5.7 seconds — more than 2x slower than the other groups. That delay reduces impressions served by 2.85%, yielding no revenue in those cases.
The 75th percentile ad latency under Privacy Sandbox is 5.7 seconds — more than 2x slower than the other groups. That delay reduces impressions served by 2.85%, yielding no revenue in those cases.
June 9, 2025 at 3:50 PM
8/ 🕛 Second: latency. On-device auctions are slow.
The 75th percentile ad latency under Privacy Sandbox is 5.7 seconds — more than 2x slower than the other groups. That delay reduces impressions served by 2.85%, yielding no revenue in those cases.
The 75th percentile ad latency under Privacy Sandbox is 5.7 seconds — more than 2x slower than the other groups. That delay reduces impressions served by 2.85%, yielding no revenue in those cases.
7/ 📦 Why so little recovery?
First: A minority of adtech vendors adopt the Sandbox, placing a ceiling on revenue upside. In our data, 7% of impressions are sold via the Protected Audience API & >27% returned Topics API categories.
First: A minority of adtech vendors adopt the Sandbox, placing a ceiling on revenue upside. In our data, 7% of impressions are sold via the Protected Audience API & >27% returned Topics API categories.
June 9, 2025 at 3:50 PM
7/ 📦 Why so little recovery?
First: A minority of adtech vendors adopt the Sandbox, placing a ceiling on revenue upside. In our data, 7% of impressions are sold via the Protected Audience API & >27% returned Topics API categories.
First: A minority of adtech vendors adopt the Sandbox, placing a ceiling on revenue upside. In our data, 7% of impressions are sold via the Protected Audience API & >27% returned Topics API categories.
6/ 🚑 Can Privacy Sandbox recover the lost revenue?
Not much. Publisher revenue falls 28% under Sandbox—meaning it recovers just 4.2% of what cookies provided.
Not much. Publisher revenue falls 28% under Sandbox—meaning it recovers just 4.2% of what cookies provided.
June 9, 2025 at 3:50 PM
6/ 🚑 Can Privacy Sandbox recover the lost revenue?
Not much. Publisher revenue falls 28% under Sandbox—meaning it recovers just 4.2% of what cookies provided.
Not much. Publisher revenue falls 28% under Sandbox—meaning it recovers just 4.2% of what cookies provided.