Sebastian Buhai
@sbuhai.bsky.social
Academic economist. Bon vivant. "Enfant terrible".
Website: https://sebastianbuhai.com
Twitter: https://twitter.com/sbuhai
Mastodon: https://mastodon.social/@sbuhai
Threads: https://www.threads.net/@sebastianbuhai
Website: https://sebastianbuhai.com
Twitter: https://twitter.com/sbuhai
Mastodon: https://mastodon.social/@sbuhai
Threads: https://www.threads.net/@sebastianbuhai
Pinned
Sebastian Buhai
@sbuhai.bsky.social
· Jul 14
So Science Magazine recently asked this question:
"What one change to scientific policy or culture would substantially decrease incidents of scientific misconduct and/or unethical behavior?"
My very serious answer (which they—seemingly—did not consider serious enough to publish) was:
"What one change to scientific policy or culture would substantially decrease incidents of scientific misconduct and/or unethical behavior?"
My very serious answer (which they—seemingly—did not consider serious enough to publish) was:
Reposted by Sebastian Buhai
A new criterion to evaluate simple but suboptimal multi-good selling mechanisms: The rate at which a seller with precise info about buyers’ valuations approximates first-best revenue. Pure bundling achieves the optimal rate and outperforms separate sales. buff.ly/oQUJwvE
November 24, 2025 at 2:03 PM
A new criterion to evaluate simple but suboptimal multi-good selling mechanisms: The rate at which a seller with precise info about buyers’ valuations approximates first-best revenue. Pure bundling achieves the optimal rate and outperforms separate sales. buff.ly/oQUJwvE
This 10' film follows Ólafsson in raw Iceland, tracing Op.109’s roots in Bach’s Goldberg cosmos and its E-minor shadow in Op.90 toward Schubert D566, recalling: “You have to feel Beethoven in your stomach when you play”: www.stage-plus.com/d...
(earlier: bsky.app/profile/sbu...
)
(earlier: bsky.app/profile/sbu...
)
Beethoven’s late sonata in radiant dialogue with Bach and Schubert: Ólafsson’s boldest journey yet. ✨ #Opus109
music.youtube.com/pl...
"Traditionalists may wince, but for those prepared to go along with him, Ólafsson opens up a transcendent vista on to a brave new world" (www.theguardian.com/...)
music.youtube.com/pl...
"Traditionalists may wince, but for those prepared to go along with him, Ólafsson opens up a transcendent vista on to a brave new world" (www.theguardian.com/...)
Opus 109 (Beethoven | Bach | Schubert)
A new music service with official albums, singles, videos, remixes, live performances and more for Android, iOS and desktop. It's all here.
music.youtube.com
November 23, 2025 at 4:49 PM
This 10' film follows Ólafsson in raw Iceland, tracing Op.109’s roots in Bach’s Goldberg cosmos and its E-minor shadow in Op.90 toward Schubert D566, recalling: “You have to feel Beethoven in your stomach when you play”: www.stage-plus.com/d...
(earlier: bsky.app/profile/sbu...
)
(earlier: bsky.app/profile/sbu...
)
Beethoven’s late sonata in radiant dialogue with Bach and Schubert: Ólafsson’s boldest journey yet. ✨ #Opus109
music.youtube.com/pl...
"Traditionalists may wince, but for those prepared to go along with him, Ólafsson opens up a transcendent vista on to a brave new world" (www.theguardian.com/...)
music.youtube.com/pl...
"Traditionalists may wince, but for those prepared to go along with him, Ólafsson opens up a transcendent vista on to a brave new world" (www.theguardian.com/...)
Opus 109 (Beethoven | Bach | Schubert)
A new music service with official albums, singles, videos, remixes, live performances and more for Android, iOS and desktop. It's all here.
music.youtube.com
November 23, 2025 at 4:31 PM
Beethoven’s late sonata in radiant dialogue with Bach and Schubert: Ólafsson’s boldest journey yet. ✨ #Opus109
music.youtube.com/pl...
"Traditionalists may wince, but for those prepared to go along with him, Ólafsson opens up a transcendent vista on to a brave new world" (www.theguardian.com/...)
music.youtube.com/pl...
"Traditionalists may wince, but for those prepared to go along with him, Ólafsson opens up a transcendent vista on to a brave new world" (www.theguardian.com/...)
Reposted by Sebastian Buhai
While others concluded COP30:
-This was the week from hell for environmental policy in the United States... Unless stopped by the courts, each of these proposed rollbacks will do irreparable harm to the nation’s water quality, endangered species and marine ecosystems.
www.nytimes.com/2025/11/22/c...
-This was the week from hell for environmental policy in the United States... Unless stopped by the courts, each of these proposed rollbacks will do irreparable harm to the nation’s water quality, endangered species and marine ecosystems.
www.nytimes.com/2025/11/22/c...
In One Week, Trump Moves to Reshape U.S. Environmental Policy
www.nytimes.com
November 22, 2025 at 10:20 PM
While others concluded COP30:
-This was the week from hell for environmental policy in the United States... Unless stopped by the courts, each of these proposed rollbacks will do irreparable harm to the nation’s water quality, endangered species and marine ecosystems.
www.nytimes.com/2025/11/22/c...
-This was the week from hell for environmental policy in the United States... Unless stopped by the courts, each of these proposed rollbacks will do irreparable harm to the nation’s water quality, endangered species and marine ecosystems.
www.nytimes.com/2025/11/22/c...
Cas Mudde is broadly right in his Guardian piece www.theguardian.com/.... When social democrats mimic far-right nativism, they don’t win far-right voters; instead they demobilize their typically urban, young, diverse base. In that sense, CPH is indeed the practical warning.
(1/3)
(1/3)
The ‘Danish model’ is the darling of centre-left parties like Labour. The problem is, it doesn’t even work in Denmark | Cas Mudde
This week’s local elections are the latest reminder that when social democrats move rightwards, they’re making a mistake, says academic and author Cas Mudde
www.theguardian.com
November 22, 2025 at 5:39 PM
Cas Mudde is broadly right in his Guardian piece www.theguardian.com/.... When social democrats mimic far-right nativism, they don’t win far-right voters; instead they demobilize their typically urban, young, diverse base. In that sense, CPH is indeed the practical warning.
(1/3)
(1/3)
Reposted by Sebastian Buhai
Lunch with the FT | Economist Philippe Aghion: ‘Macron’s legacy will be better than people think’ on.ft.com/3LKzECS #FTEdit
Economist Philippe Aghion: ‘Macron’s legacy will be better than people think’
France’s new Nobel laureate on stimulating growth, the power of creative destruction — and why Karl Lagerfeld helped him with his homework
on.ft.com
November 22, 2025 at 10:03 AM
Lunch with the FT | Economist Philippe Aghion: ‘Macron’s legacy will be better than people think’ on.ft.com/3LKzECS #FTEdit
Several strong talks at Banco de Chile’s centennial, but Guido Lorenzoni’s stolen the show so far; Ivan Werning’s equally great discussion cosigned it hard. PS. They somehow unleashed a rainforest of equations and still beat the buzzer—alive. 😁
(earlier: x.com/sbuhai/status/...)
(earlier: x.com/sbuhai/status/...)
November 21, 2025 at 2:36 PM
Several strong talks at Banco de Chile’s centennial, but Guido Lorenzoni’s stolen the show so far; Ivan Werning’s equally great discussion cosigned it hard. PS. They somehow unleashed a rainforest of equations and still beat the buzzer—alive. 😁
(earlier: x.com/sbuhai/status/...)
(earlier: x.com/sbuhai/status/...)
At Banco Central de Chile’s *centennial* conference. Parsing monetary policy and asset prices, and mapping the GE spillovers into labor matching and IO markups. Also here for a sharp IV… and a competitive coffee equilibrium. 😉
A priori, inciting program: shorturl.at/5es0H
A priori, inciting program: shorturl.at/5es0H
November 20, 2025 at 12:43 PM
At Banco Central de Chile’s *centennial* conference. Parsing monetary policy and asset prices, and mapping the GE spillovers into labor matching and IO markups. Also here for a sharp IV… and a competitive coffee equilibrium. 😉
A priori, inciting program: shorturl.at/5es0H
A priori, inciting program: shorturl.at/5es0H
Reposted by Sebastian Buhai
NEW: my selection of the greatest jazz piano albums of all time
iverson.substack.com/p/tt-556-the...
iverson.substack.com/p/tt-556-the...
TT 556: The Greatest Jazz Piano Albums of All Time
or really: from 1921 to 1990
iverson.substack.com
November 19, 2025 at 3:48 PM
NEW: my selection of the greatest jazz piano albums of all time
iverson.substack.com/p/tt-556-the...
iverson.substack.com/p/tt-556-the...
Reposted by Sebastian Buhai
Forthcoming in the AER: "What You Don’t Know May Be Good For You" by Johannes Hörner and Larry Samuelson. www.aeaweb.org/articles?id=...
What You Don’t Know May Be Good For You
(Forthcoming Article) - We consider an economy in which long-lived experts are matched with short-lived
clients. Experts choose the type of client with whom they match, unobserved by the
market. The i...
www.aeaweb.org
November 18, 2025 at 3:04 PM
Forthcoming in the AER: "What You Don’t Know May Be Good For You" by Johannes Hörner and Larry Samuelson. www.aeaweb.org/articles?id=...
I used to think Summers was quite smart, even brilliant at times. But once you’re workshopping your love life and fundraising strategy with a convicted sex offender, you’re not committing an “error of judgment”; you’re cruising in 1st class to Ivy League–grade moral bankruptcy…
November 18, 2025 at 2:23 PM
I used to think Summers was quite smart, even brilliant at times. But once you’re workshopping your love life and fundraising strategy with a convicted sex offender, you’re not committing an “error of judgment”; you’re cruising in 1st class to Ivy League–grade moral bankruptcy…
Este fin de semana descubrimos que un “paseo de curso” se traduce como: niños felices, padres rendidos y material de conversación para meses. Hay sospechas fundadas de que los adultos lo pasamos incluso mejor que ellos, ¿cachai? 😏🙃🎒☀️🇨🇱
November 17, 2025 at 2:01 AM
Este fin de semana descubrimos que un “paseo de curso” se traduce como: niños felices, padres rendidos y material de conversación para meses. Hay sospechas fundadas de que los adultos lo pasamos incluso mejor que ellos, ¿cachai? 😏🙃🎒☀️🇨🇱
Cochrane’s riff on partisan loyalties, beyond rent control, belongs above every econ dept coffee machine. I'm not GOP-leaning (how could anyone be in Trump’s age?!) but once identity is fixed EX ANTE, welfare is no longer the objective function; votes are.
Price Control Apologia
My colleague and friend Neale Mahoney writes in favor of price and rent controls in the Sunday New York Times, with Bharat Ramamurti.
www.grumpy-economist.com
November 16, 2025 at 10:04 PM
Cochrane’s riff on partisan loyalties, beyond rent control, belongs above every econ dept coffee machine. I'm not GOP-leaning (how could anyone be in Trump’s age?!) but once identity is fixed EX ANTE, welfare is no longer the objective function; votes are.
Anoche en el concierto del Brussels Philharmonic String Quartet en Santiago: fui por Bach, Shostakóvich y Weill, pero quien se robó la noche fue Jimmy Beas. Ovación total tras su segunda pieza.
P.S. Y saludo a mi compatriota rumano Mihai Cocea del Quartet: quizá los únicos 🇷🇴🎻
P.S. Y saludo a mi compatriota rumano Mihai Cocea del Quartet: quizá los únicos 🇷🇴🎻
November 15, 2025 at 3:37 PM
Anoche en el concierto del Brussels Philharmonic String Quartet en Santiago: fui por Bach, Shostakóvich y Weill, pero quien se robó la noche fue Jimmy Beas. Ovación total tras su segunda pieza.
P.S. Y saludo a mi compatriota rumano Mihai Cocea del Quartet: quizá los únicos 🇷🇴🎻
P.S. Y saludo a mi compatriota rumano Mihai Cocea del Quartet: quizá los únicos 🇷🇴🎻
Solo en la FEA UC inauguras edificio nuevo con sexteto donde tres son economistas full time: hoy las únicas curvas fueron melódicas y el equilibrio general fue… musical. 🎻📊
November 14, 2025 at 5:42 PM
Solo en la FEA UC inauguras edificio nuevo con sexteto donde tres son economistas full time: hoy las únicas curvas fueron melódicas y el equilibrio general fue… musical. 🎻📊
Field experiment complete: when patience is high and breakdowns are rare, even my talk converges to a 𝑢𝑛𝑖𝑞𝑢𝑒 𝑛𝑜-𝑑𝑒𝑙𝑎𝑦 𝑒𝑞𝑢𝑖𝑙𝑖𝑏𝑟𝑖𝑢𝑚. (Translated to plain English: great crowd, great flow.)
This was fun, you can definitely book me for more Theory Seminars!
This was fun, you can definitely book me for more Theory Seminars!
November 12, 2025 at 10:28 PM
Field experiment complete: when patience is high and breakdowns are rare, even my talk converges to a 𝑢𝑛𝑖𝑞𝑢𝑒 𝑛𝑜-𝑑𝑒𝑙𝑎𝑦 𝑒𝑞𝑢𝑖𝑙𝑖𝑏𝑟𝑖𝑢𝑚. (Translated to plain English: great crowd, great flow.)
This was fun, you can definitely book me for more Theory Seminars!
This was fun, you can definitely book me for more Theory Seminars!
Cum bine explică George Jiglău: problema nu e 300 vs 465, ci cine și cum umple fiecare loc. Mai puțini parlamentari, dar aleși tot de pe liste închise, înseamnă aceeași politică, în mai puține costume... Reformă reală = liste deschise și alegere informată.
Reducerea numărului de parlamentari nu e o soluție pentru reala problemă a neîncrederii oamenilor in politicieni. Și o contrapropunere - Contributors
Recent, în discuția publică din România s-a regăsit din nou tema reducerii numărului de parlamentari, sub două forme principale. În primul rând, un proiect de lege depus de USR a propus ca numărul total de aleşi în cele două camere să fie redus la 300 (faţă de cele circa 465 în prezent) – proiect care […]
www.contributors.ro
November 10, 2025 at 7:41 PM
Cum bine explică George Jiglău: problema nu e 300 vs 465, ci cine și cum umple fiecare loc. Mai puțini parlamentari, dar aleși tot de pe liste închise, înseamnă aceeași politică, în mai puține costume... Reformă reală = liste deschise și alegere informată.
Reposted by Sebastian Buhai
Living with the water: the Netherlands’ floating futures – photo essay
Living with the water: the Netherlands’ floating futures – photo essay
Photographer Alessandro Gandolfi’s latest project looks at how sustainable floating neighbourhoods offer a way forward as the sea rises
www.theguardian.com
November 10, 2025 at 9:50 AM
Living with the water: the Netherlands’ floating futures – photo essay
Q1 objective: upgrade the C-suite to the sea-suite. #WeekendPacificOffice #ValparaisoVibes
November 8, 2025 at 10:16 PM
Q1 objective: upgrade the C-suite to the sea-suite. #WeekendPacificOffice #ValparaisoVibes
Reposted by Sebastian Buhai
Forthcoming in AER: Insights: "Pricing with Algorithms" by Rohit Lamba and Sergey Zhuk. www.aeaweb.org/articles?id=...
Pricing with Algorithms
(Forthcoming Article) - This paper studies Markov perfect equilibria in a repeated duopoly model where
sellers choose algorithms. An algorithm is a mapping from the competitor’s price to
own price. On...
www.aeaweb.org
November 6, 2025 at 3:18 PM
Forthcoming in AER: Insights: "Pricing with Algorithms" by Rohit Lamba and Sergey Zhuk. www.aeaweb.org/articles?id=...
Excited to release a new working paper: "Real Option AI: Reversibility, Silence, and the Release Ladder" www.sebastianbuhai.c...
Why do AI labs go quiet… then drop a big release… then patch like crazy… then go quiet again? I build a model that makes that cadence optimal.
1/7
Why do AI labs go quiet… then drop a big release… then patch like crazy… then go quiet again? I build a model that makes that cadence optimal.
1/7
November 4, 2025 at 8:25 PM
Excited to release a new working paper: "Real Option AI: Reversibility, Silence, and the Release Ladder" www.sebastianbuhai.c...
Why do AI labs go quiet… then drop a big release… then patch like crazy… then go quiet again? I build a model that makes that cadence optimal.
1/7
Why do AI labs go quiet… then drop a big release… then patch like crazy… then go quiet again? I build a model that makes that cadence optimal.
1/7
Reposted by Sebastian Buhai
David Gale’s work was diverse and impactful in math and econ
#econsky
#econsky
David Gale (1921-2008) remembered, with a (belated) 100th birthday volume
marketdesigner.blogspot.com
November 3, 2025 at 2:24 PM
David Gale’s work was diverse and impactful in math and econ
#econsky
#econsky
Some cities had Halloween; we had SantiagLOWEEN last night: vampires, witches, petro-chic tycoons, marigold-haloed Catrinas & one hard-rock warlock turned the patio into a coven mosh pit; jack-o'-lanterns demanded encores. Trick-or-riff achieved! 🎃🧛♀️🧙♀️🤘 #Halloween2025
November 1, 2025 at 4:36 PM
Some cities had Halloween; we had SantiagLOWEEN last night: vampires, witches, petro-chic tycoons, marigold-haloed Catrinas & one hard-rock warlock turned the patio into a coven mosh pit; jack-o'-lanterns demanded encores. Trick-or-riff achieved! 🎃🧛♀️🧙♀️🤘 #Halloween2025
À voir : T. Gowers, « Quel sera l’impact de l’IA sur les maths? » youtu.be/bcTWVUueai4
À lire : A. Kontorovich, « The Shape of Math To Come » arxiv.org/pdf/2510.1...
Du tableau noir au CI/CD d’idées : conjecture→issue, preuve→pipeline, et l’intuition reste le commit initial.
À lire : A. Kontorovich, « The Shape of Math To Come » arxiv.org/pdf/2510.1...
Du tableau noir au CI/CD d’idées : conjecture→issue, preuve→pipeline, et l’intuition reste le commit initial.
Quel sera l’impact de l’IA sur les mathématiques dans les prochaines années ? - Timothy Gowers
Colloque de rentrée 2025 : Formes de l’intelligence : IA, connaissance, déduction, apprentissage
Conférence du 16 octobre 2025 : Quel sera l’impact de l’IA sur les mathématiques dans les prochaines années ?
IA et sciences, allers-retours
Conférencier : Timothy Gowers, professeur du Collège de Franc
youtu.be
October 31, 2025 at 12:49 PM
À voir : T. Gowers, « Quel sera l’impact de l’IA sur les maths? » youtu.be/bcTWVUueai4
À lire : A. Kontorovich, « The Shape of Math To Come » arxiv.org/pdf/2510.1...
Du tableau noir au CI/CD d’idées : conjecture→issue, preuve→pipeline, et l’intuition reste le commit initial.
À lire : A. Kontorovich, « The Shape of Math To Come » arxiv.org/pdf/2510.1...
Du tableau noir au CI/CD d’idées : conjecture→issue, preuve→pipeline, et l’intuition reste le commit initial.
Looking fwd to stirring trouble (the good kind) over the next 2 days at the IO Workshop in Chile, hosted by U Los Andes & UC Chile: sites.google.com/uc....
On this occasion I’ll also debut my—preliminary—project, “Real Option AI: Reversibility, Silence, and the Release Ladder” 🤖
On this occasion I’ll also debut my—preliminary—project, “Real Option AI: Reversibility, Silence, and the Release Ladder” 🤖
IO in Chile - Seminars & Workshops
2025
sites.google.com
October 28, 2025 at 2:33 PM
Looking fwd to stirring trouble (the good kind) over the next 2 days at the IO Workshop in Chile, hosted by U Los Andes & UC Chile: sites.google.com/uc....
On this occasion I’ll also debut my—preliminary—project, “Real Option AI: Reversibility, Silence, and the Release Ladder” 🤖
On this occasion I’ll also debut my—preliminary—project, “Real Option AI: Reversibility, Silence, and the Release Ladder” 🤖