Alexander Berger
@albrgr.bsky.social
CEO of Open Philanthropy
I’m extremely grateful to my colleagues and to the donors and grantees who have made this new chapter possible. They've set us up to deliver far more impact in our second decade than in our first. I can't wait to see what we accomplish together.
November 18, 2025 at 3:07 PM
I’m extremely grateful to my colleagues and to the donors and grantees who have made this new chapter possible. They've set us up to deliver far more impact in our second decade than in our first. I can't wait to see what we accomplish together.
We’re incredibly excited for what more effective philanthropic capital could unlock: new vaccines for some of the world’s deadliest diseases, intelligent navigation of rapid AI progress, faster economic growth, and meaningful reductions in animal suffering.
November 18, 2025 at 3:07 PM
We’re incredibly excited for what more effective philanthropic capital could unlock: new vaccines for some of the world’s deadliest diseases, intelligent navigation of rapid AI progress, faster economic growth, and meaningful reductions in animal suffering.
Our work with donors also includes creating custom menus of giving opportunities, “learning journeys” that bring donors up to speed on areas of interest, and operational advising and support. Learn more here:
coefficientgiving.org/about-us/pa...
coefficientgiving.org/about-us/pa...
Partner With Us | Coefficient Giving
coefficientgiving.org
November 18, 2025 at 3:07 PM
Our work with donors also includes creating custom menus of giving opportunities, “learning journeys” that bring donors up to speed on areas of interest, and operational advising and support. Learn more here:
coefficientgiving.org/about-us/pa...
coefficientgiving.org/about-us/pa...
From today, all our programs will work similarly to LEAF and AGF - they’ll be funds that other donors can support at scale.
Each will seek to pool capital and direct it toward the most promising opportunities in a cause area. Full list here, now with pretty colors:
coefficientgiving.org/funds/
Each will seek to pool capital and direct it toward the most promising opportunities in a cause area. Full list here, now with pretty colors:
coefficientgiving.org/funds/
Funds | Coefficient Giving
Our funds enable philanthropists to pool resources around rigorously selected, high-impact cause areas.
coefficientgiving.org
November 18, 2025 at 3:07 PM
From today, all our programs will work similarly to LEAF and AGF - they’ll be funds that other donors can support at scale.
Each will seek to pool capital and direct it toward the most promising opportunities in a cause area. Full list here, now with pretty colors:
coefficientgiving.org/funds/
Each will seek to pool capital and direct it toward the most promising opportunities in a cause area. Full list here, now with pretty colors:
coefficientgiving.org/funds/
Another example: this year, we launched the >$120m Abundance & Growth Fund, led by @mattsclancy.bsky.social, to boost economic growth and scientific & technological progress.
bsky.app/profile/alb...
bsky.app/profile/alb...
Alexander Berger (@albrgr.bsky.social)
Exciting update: @open_phil is doubling down on our YIMBY, innovation, and metascience success by launching a >$120m Abundance & Growth Fund to accelerate economic growth and boost scientific & technological progress. Funding from @goodventures.bsky.social, Patrick Collison, and others.
Why now? 🧵
bsky.app
November 18, 2025 at 3:07 PM
Another example: this year, we launched the >$120m Abundance & Growth Fund, led by @mattsclancy.bsky.social, to boost economic growth and scientific & technological progress.
bsky.app/profile/alb...
bsky.app/profile/alb...
After making several promising exploratory grants alongside GiveWell, another donor we've worked with before suggested we start a pooled fund to scale this work.
Today, LEAF supporters have collectively committed over $125m to reduce lead poisoning.
coefficientgiving.org/funds/lead-...
Today, LEAF supporters have collectively committed over $125m to reduce lead poisoning.
coefficientgiving.org/funds/lead-...
Lead Exposure Action Fund | Coefficient Giving
coefficientgiving.org
November 18, 2025 at 3:07 PM
After making several promising exploratory grants alongside GiveWell, another donor we've worked with before suggested we start a pooled fund to scale this work.
Today, LEAF supporters have collectively committed over $125m to reduce lead poisoning.
coefficientgiving.org/funds/lead-...
Today, LEAF supporters have collectively committed over $125m to reduce lead poisoning.
coefficientgiving.org/funds/lead-...
Reducing lead poisoning scored well on three criteria we use as a proxy for cost-effectiveness:
- Importance: 1m deaths per year, >⅓ of children worldwide affected
- Neglectedness: <1% the funding of malaria or TB
- Tractability: Proven ways of reducing lead in spices & paint
- Importance: 1m deaths per year, >⅓ of children worldwide affected
- Neglectedness: <1% the funding of malaria or TB
- Tractability: Proven ways of reducing lead in spices & paint
November 18, 2025 at 3:07 PM
Reducing lead poisoning scored well on three criteria we use as a proxy for cost-effectiveness:
- Importance: 1m deaths per year, >⅓ of children worldwide affected
- Neglectedness: <1% the funding of malaria or TB
- Tractability: Proven ways of reducing lead in spices & paint
- Importance: 1m deaths per year, >⅓ of children worldwide affected
- Neglectedness: <1% the funding of malaria or TB
- Tractability: Proven ways of reducing lead in spices & paint
An illustrative example of our work with other donors is our Lead Exposure Action Fund, which has brought together 12 philanthropists to more than double baseline global spending on lead reduction in poor countries.
bsky.app/profile/alb...
bsky.app/profile/alb...
Alexander Berger (@albrgr.bsky.social)
Great new article on the tragedy of lead exposure:
- 1 in 3 kids have high levels of lead in their blood
- Some estimates attribute 5.5m deaths (more than AIDS+TB+malaria)
- Costs ~1% in global GDP
This is an important, tractable, and neglected problem. We can make progress!
https://bsky.app/profile/leecrawfurd.bsky.social/post/3lrfvqxr5hj23
bsky.app
November 18, 2025 at 3:07 PM
An illustrative example of our work with other donors is our Lead Exposure Action Fund, which has brought together 12 philanthropists to more than double baseline global spending on lead reduction in poor countries.
bsky.app/profile/alb...
bsky.app/profile/alb...
Our new name reflects various aspects of this new chapter:
“Co” -> collaborating with other donors
“Efficient” -> a nod to cost-effectiveness
“Coefficient” -> multiplying others’ impact, ROI
(And “giving” is much less of a mouthful than “philanthropy”)
coefficientgiving.org/research/th...
“Co” -> collaborating with other donors
“Efficient” -> a nod to cost-effectiveness
“Coefficient” -> multiplying others’ impact, ROI
(And “giving” is much less of a mouthful than “philanthropy”)
coefficientgiving.org/research/th...
The Story Behind Our New Name | Coefficient Giving
A coefficient multiplies the value of whatever it’s paired with, just as we aim to amplify impact through our research, grantmaking, and partnerships. We knew that any name would take some getting used to, but this one captured something essential about our work.
coefficientgiving.org
November 18, 2025 at 3:07 PM
Our new name reflects various aspects of this new chapter:
“Co” -> collaborating with other donors
“Efficient” -> a nod to cost-effectiveness
“Coefficient” -> multiplying others’ impact, ROI
(And “giving” is much less of a mouthful than “philanthropy”)
coefficientgiving.org/research/th...
“Co” -> collaborating with other donors
“Efficient” -> a nod to cost-effectiveness
“Coefficient” -> multiplying others’ impact, ROI
(And “giving” is much less of a mouthful than “philanthropy”)
coefficientgiving.org/research/th...
Our ambition has always been to work with more donors once we had enough bandwidth to support Good Ventures.
We started in earnest in 2024, directing over $100m from other donors. We more than doubled that so far in 2025. We’re aiming for a lot more in years to come.
We started in earnest in 2024, directing over $100m from other donors. We more than doubled that so far in 2025. We’re aiming for a lot more in years to come.
November 18, 2025 at 3:07 PM
Our ambition has always been to work with more donors once we had enough bandwidth to support Good Ventures.
We started in earnest in 2024, directing over $100m from other donors. We more than doubled that so far in 2025. We’re aiming for a lot more in years to come.
We started in earnest in 2024, directing over $100m from other donors. We more than doubled that so far in 2025. We’re aiming for a lot more in years to come.
In the coming years, we’ll continue to grow our work with Good Ventures. But many others are interested in giving at scale and not on track. We often hear people cite a lack of outstanding, shovel-ready opportunities.
November 18, 2025 at 3:07 PM
In the coming years, we’ll continue to grow our work with Good Ventures. But many others are interested in giving at scale and not on track. We often hear people cite a lack of outstanding, shovel-ready opportunities.
Over the last decade, we’ve worked closely with our founding partner Good Ventures to give away over $4b. I am very proud of the results:
November 18, 2025 at 3:07 PM
Over the last decade, we’ve worked closely with our founding partner Good Ventures to give away over $4b. I am very proud of the results:
First, here’s a link to my essay about the shift (on our brand new website, click around!) and what we're trying to do in our second decade:
coefficientgiving.org/research/op...
coefficientgiving.org/research/op...
Open Philanthropy Is Now Coefficient Giving | Coefficient Giving
Our new name marks our next chapter as we double down on our longstanding goal of helping more funders increase their impact. We believe philanthropy can be a far more vital force for progress than it is today.
coefficientgiving.org
November 18, 2025 at 3:07 PM
First, here’s a link to my essay about the shift (on our brand new website, click around!) and what we're trying to do in our second decade:
coefficientgiving.org/research/op...
coefficientgiving.org/research/op...
More on the fund here: www.openphilanthropy.org/research/ec...
Economic Growth in Low- and Middle-Income Countries | Open Philanthropy
This is a high-level summary of our approach to launching a program focused on economic growth in low- and middle-income countries (LMICs) and not a medium investigation. We wanted to publish this summary in tandem with launching a Program Officer search, to give potential applicants more detail on how we are approaching this program, and […]
www.openphilanthropy.org
October 21, 2025 at 10:48 PM
More on the fund here: www.openphilanthropy.org/research/ec...
And for a deeper dive into the lead poisoning, check out this article: worksinprogress.co/issue/the-e...
The end of lead - Works in Progress Magazine
Lead has been all but eliminated in most of the developed world. Doing the same for the rest of the world might not be difficult.
worksinprogress.co
October 20, 2025 at 8:01 PM
And for a deeper dive into the lead poisoning, check out this article: worksinprogress.co/issue/the-e...
We still have a long ways to go on solving the housing shortage, but today we’re one step closer!
Kudos to @scottwiener.bsky.social, @buffywicks.bsky.social, @cayimby.bsky.social, and countless others who pushed for this reform.
Kudos to @scottwiener.bsky.social, @buffywicks.bsky.social, @cayimby.bsky.social, and countless others who pushed for this reform.
October 10, 2025 at 5:08 PM
We still have a long ways to go on solving the housing shortage, but today we’re one step closer!
Kudos to @scottwiener.bsky.social, @buffywicks.bsky.social, @cayimby.bsky.social, and countless others who pushed for this reform.
Kudos to @scottwiener.bsky.social, @buffywicks.bsky.social, @cayimby.bsky.social, and countless others who pushed for this reform.
I think Jeremy Stoppelman sometimes doesn't get enough credit in these stories either - his funding originally let Sonja Trauss go full time, and was early on CA YIMBY too. We never anticipated just how much impact could potentially come from that early support for a nascent movement.
October 10, 2025 at 5:08 PM
I think Jeremy Stoppelman sometimes doesn't get enough credit in these stories either - his funding originally let Sonja Trauss go full time, and was early on CA YIMBY too. We never anticipated just how much impact could potentially come from that early support for a nascent movement.
Another lesson is that there are sometimes incredibly outsized wins from field building, often in surprising ways. @hanlon.bsky.social was able to start CA YIMBY because he had a full time job in the YIMBY space that let him start advocating in Sacramento.
October 10, 2025 at 5:08 PM
Another lesson is that there are sometimes incredibly outsized wins from field building, often in surprising ways. @hanlon.bsky.social was able to start CA YIMBY because he had a full time job in the YIMBY space that let him start advocating in Sacramento.