Alexander Berger ✓

@albrgr · San Francisco, CA · joined 05 Mar 2011

Enjoys a good applied micro paper. CEO of @coeff_giving. Views my own, tweets self-destruct every once in a while.

16 880Followers

2 160Following

1 681Posts total

260KViews on collected posts

Against accounts of the same size

8 posts from the last 90 days, next to the 10K–100K follower range. shown widely, but few of those viewers react.

Median views8 520this account2 896median for 10K–100K

Reach, %50.47%this account9.51%median for 10K–100K

Engagement, %0.74%this account1.56%median for 10K–100K

Metric	This account	Median for 10K–100K	Ratio
Median views per post	8 520	2 896	2.94×
Reach (views ÷ followers)	50.47%	9.51%	5.31×
Engagement rate	0.74%	1.56%	0.47×

Others in this range → Compare with another account → How these benchmarks are built →

Growth & engagement

How the posts we collected actually performed: views and reaction rate post by post, what the audience did with them, and where the follower count goes.

Views per post

32.6K12 Mar

111.4K27 Aug

2.8K28 Aug

15.6K31 Aug

2.1K

11.9K2 Sep

77.7K

766

5.2K

Last 9 collected posts, oldest on the left. The scale is logarithmic: one post can outrun the rest a hundred times over.

Engagement rate per post

0.98%12 Mar

0.40%27 Aug

0.29%28 Aug

0.96%31 Aug

0.82%

0.82%2 Sep

0.16%

0.65%

1.41%

Reactions — likes, reposts, replies and quotes — divided by views. Median for 10K–100K accounts is 1.56%.

What the audience does

Likes78.6%1 036 in total

Reposts10.1%133 in total

Replies4.1%54 in total

Quotes1.6%21 in total

Bookmarks5.6%74 in total

Share of every reaction we collected for this account. Replies mean argument, reposts mean endorsement, bookmarks mean the post was worth keeping.

The follower curve appears once this account has two daily snapshots — we take one a day, and this one is on its first.

Latest posts

Another paper finding big near term mortality impacts from air pollution, and if I'm reading it right, suggesting that extrapolating over full lifespan suggests that reducing air pollution by ~10% would save ~1 year of life across the US population - huge effects! https://t.co/MC 5.2K views · 57 likes · 15 reposts · 0 replies 02 Sep 2026 https://t.co/KGg8aSUpfH 766 views · 5 likes · 0 reposts · 0 replies 02 Sep 2026 Forthcoming in the AER: "Eclipse of Rent-Sharing: The Effects of Managers’ Business Education on Wages and the Labor Share in the US and Denmark" by Daron Acemoglu, Alex Xi He, and Daniel le Maire. https://t.co/rqXsAPk7KP 77.7K views · 101 likes · 21 reposts · 0 replies 02 Sep 2026 Forthcoming in the AER: "The Long-run Effect of Air Pollution on Survival" by Julian Reif and Tatyana Deryugina. https://t.co/FTJT8Hf864 11.9K views · 77 likes · 18 reposts · 0 replies 02 Sep 2026 https://t.co/gLChe0qYKO 2.1K views · 16 likes · 0 reposts · 1 replies 31 Aug 2026 Forthcoming in the AER: "Self-Selection and the Diminishing Returns of Research" by Kai-Jie Wu and Lorenz K.F. Ekerdt. https://t.co/oxqL0VgEFJ 15.6K views · 120 likes · 23 reposts · 4 replies 31 Aug 2026 interesting back and forth here 2.8K views · 8 likes · 0 reposts · 0 replies 28 Aug 2026 Good pushes! There's 2 rough categories to your points 1. Will there be enough demand? 2. Will labs be able to capture the value? Let me address both. 1. Re demand One intuition pump is this analysis that Epoch did that shows that if all 30 million programmers in the world 111.4K views · 396 likes · 17 reposts · 31 replies 27 Aug 2026 .@coeff_giving directed over $1b in 2025, the most in our history. I wrote a more personal annual letter this year, focusing on what a decade of grantmaking has taught me, how I'm thinking about AI, and how we're grappling with giving at this scale. 🧵 https://t.co/kb7Ij7kIga 32.6K views · 256 likes · 39 reposts · 18 replies 12 Mar 2026