Random Priority—a popular no-transfer allocation mechanism—is efficient, fair, & simple to participate in. Is it the only mechanism with these properties? Marek Pycia @econ.uzh.ch and Peter Troyan, UVA Economics, answer this long-standing question in the positive. buff.ly/zlSjmC0

My daughter, the cat whisperer 👧🐈. Monteverde 🇨🇷 field experiment: the cat–human matching market clears at one cuddle, with results robust across all four panels. Perfect compliance, zero attrition, and no control cat willing to remain untreated. Local equilibrium: purr-a vida!

During today's #ICM2026 opening ceremonies, the IMU announced the 2026 Fields Medals recipients: Yu Deng, John Pardon, Jacob Tsimerman, and Hong Wang Read more: https://bit.ly/4psOJbU

Every four years, the math world’s preeminent awards are given to the finest minds of a generation. The young Fields and Abacus Medal winners — all under 40 on the first day of the year — have reshaped mathematics and theoretical computer science. Here are the #ICM2026 winners:

A rare case of entry I am delighted not to deter: Steve Salop’s new antitrust guide arrives just in time for my new UC Chile course, Economics of Global Competition. Free PDF, low barriers to entry, likely dominant position on the recommended-reading list! bsky.app/profile/sher...

Herb Hovenkamp@sherman1890.bsky.social · 2w ago

Prominent post-Chicago antitrust economist Steve Salop (G-Town) has performed a great service -- a guide to antitrust and modern economics -- free in .pdf or an inexpensive Amazon Paperback. You dont need much economics in order to read it. econantitrustguide.com

Your competitors have probably watched this. Starting this August at UC Chile, I’m teaching a new course on the economics of global competition: how firms outthink rivals, shape markets—and why hope is not a strategy. Brief pitch: www.youtube.com/watc... Hope to see you in class!

Je viens d’apprendre, avec une immense tristesse, la disparition de Bertrand Grébaut. Après sept ans à Paris et tant de tables en France, Septime restait ma préférée... Plus qu’un chef de génie, il portait une vision rare de ce qu’un grand restaurant peut être. La Cave aussi. RIP

Bertrand Grébaut, cofondateur du restaurant Septime et électron libre de la cuisine contemporaine française, est mort

Le chef parisien, disparu précocement à l’âge de 44 ans, fut l’un des pionniers d’une cuisine bistronomique aussi rigoureuse qu’inventive.

lemonde.fr

Sebastian Buhai@sbuhai.bsky.social · last yr.

Excellent épisode du "Goût de M" hier, sur l'un de mes restaurants préférés, Septime — avec Théo Pourriat et Bertrand Grébaut, ses créateurs: podcasts.lemonde.fr/... (Plus tôt sur le sujet "Septime": x.com/sbuhai/status/...)

Thrilled to resume twice daily swims in Monteverde 🇨🇷, where coffee shifts the production frontier, butterfly turns caffeine into output, each splash endogenizes rainfall, clouds supply the drama, and the cat stays Reviewer 2. Utility rises even as shoulder capital depreciates!

My search for the perfect ruin bar in Budapest

My search for the perfect ruin bar in Budapest

These cool, cheap bars in old abandoned buildings became popular in the 2000s – and then tourists moved in. I went hunting for the bohemian spirit of the originals

theguardian.com

On July 3, EIEF celebrated Luigi Guiso’s retirement with a conference honoring his outstanding contributions to economic research. We thank all who joined us for this special occasion. Luigi will continue his collaboration with EIEF as Senior Professor and holder of the AXA Chair.

România e țara unde Gödel nu se citește, însă se... guvernează. Anul trecut speranța era indecidabilă (a se reciti www.sebastianbuhai.c...), azi cere încă 233 de constante într-un Parlament de variabile (eufemism matematic). Matematica n-a prins, dar implicațiile vin cu scadență.

The Cover-Up in Gino v Harvard datacolada.org/136

What securities emerge when competing investors design financing contracts? With dispersed information about common values, debt best protects investors from the winner’s curse and sellers’ informed selection—unlike in monopoly or private-value settings. buff.ly/g6q6D9Y

USA 1–4 Belgium. Trump says if you only count the legal goals, America won 1–0. p.s. My prediction was 1-3.

USA 1–3 Belgium. Trump says all three Belgian goals were Brussels interference.

USA 1–2 Belgium. Trump’s demanding VAR check Belgium’s birth certificate.

The Guardian commentator found the only sane XI in Brazil-Norway (before Haaland turned minimalism into a brace): "If you asked me who I think the best team in this game is, I’d say Cape Verde." P.S. Eventually Norway won 2–1, but Cesária Évora remains, spiritually, undefeated...

How does consumer data let platforms shape competition? Elliott, Galeotti, Koh, and Li show how platforms can use consumer data to segment markets for the benefit of firms or consumers. www.restud.com/market-segme... #REStud #EconSky

Forthcoming in the AER: "Screening and Segmenting: A Consumer Surplus Perspective" by Dirk Bergemann, Tibor Heumann, and Michael C. Wang.

Screening and Segmenting: A Consumer Surplus Perspective

(Forthcoming Article) - We analyze consumer surplus when a monopolist can adjust both prices and product qualities across segments, engaging in second- and third-degree price discrimination simultaneously. We characterize the consumer-optimal segmentation and show that it has a striking structure: consumers with the same value receive the same quality in every segment, though prices differ. Under mild conditions, any segmentation harms consumers if and only if demand is sufficiently more elastic than supply. Hence, potential benefits for consumers depend critically on demand and supply elasticities. These findings have implications for regulatory policy regarding price discrimination and market segmentation.

aeaweb.org

Forthcoming in AEJ: Microeconomics: "Optimal Costly Oversight with Investment and Cream-Skimming" by Sumeyra Akin and Tibor Heumann.

Optimal Costly Oversight with Investment and Cream-Skimming

(Forthcoming Article) - Transplant center oversight—conducted through costly flagging based on survival rates—is intended to improve outcomes. However, it has faced challenges because centers strategically select patients (and organs) to improve their reported outcomes. We study the optimal flagging policy using a mechanism-design model in which heterogeneous centers can improve their survival rates by investing, selecting patients, or both. We find that (a) the optimal mechanism never flags intrinsically good-enough center types, and (b) under the optimal mechanism, intrinsically worse centers select patients, while intrinsically better centers underinvest. These results apply to the regulation of charter schools and development banks.

aeaweb.org

RIP François Englert. Briefly chatted with him in Stockholm in Dec. 2013. He was charmed that even an economist knew some real details of his work... until I mentioned Gerard 't Hooft had once nearly lured me into physics. That, I suspect, was my own symmetry-breaking moment :-).

François Englert (1932 – 2026) It is with great sadness that we announce that Belgian theoretical physicist, François Englert, has passed away at the age of 93. Read more: home.cern/francois-eng...

“The discrepancy between the Rabelais book and Bakhtin’s other studies has mystified Bakhtin scholars. Some who applaud one Bakhtin find the other unconvincing or even repellent.” —Gary Saul Morson

Reassembling Bakhtin | Gary Saul Morson

Since Mikhail Bakhtin became widely known in the 1980s, his book on Rabelais has perplexed readers for its seemingly contradictory stance to everything else he wrote.

nybooks.com

Fresh research: Who Counts as Young? Matching Rules for Social Discounting. We often compare the young with the old, but in a heterogeneous OLG economy age alone can't define the object b/c assets, earnings, constraints, and private values enter before the normative question. 1/4

In 1992, two mathematicians proved that seven riffle shuffles are enough to shuffle a deck of cards — but only if you can cut your deck with the precision of a professional magician. A new proof gives hope for those with a less magical touch. www.quantamagazine.org/seven-perfec...

Seven Perfect Shuffles Randomize a Deck of Cards. But How Many Sloppy Ones? | Quanta Magazine

A decades-old proof showed that seven shuffles are enough to mix up a deck of cards. But it requires you to cut the deck with the precision of a professional magician. A new proof gets around that obs...

quantamagazine.org

Please find attached my latest four Superbru predictions. I prefer not to discuss the pre-treatment sample, but the post-intervention results are extremely encouraging. On the basis of this now robust four-match evidence, I see no reason not to extrapolate greatness indefinitely!

From the pain of apartheid to luscious beauty: 10 of the best recordings by jazz legend Abdullah Ibrahim

From the pain of apartheid to luscious beauty: 10 of the best recordings by jazz legend Abdullah Ibrahim

The pianist and bandleader, who has died aged 91, had an inimitable style where bright, guileless melody met a fearless improvisational impulse

theguardian.com

David Hockney once said Monet would have used the iPad. Today the iPad returns the compliment. In Hockney's hands, pixels remembered their oldest ambition: to be light. RIP, maestro. (www.theguardian.com/artanddesign...)

‘David Hockney changed the world just by looking at it’: a tribute to the artist whose work was a feast of visual pleasures

He was subversive and bold, yet also playful and accepting – putting the fun into pop art and finding freedom and fulfilment amid the blue skies and pools of California. David Hockney, who has died ag...

theguardian.com

Sebastian Buhai@sbuhai.bsky.social · 2y ago

C’est vrai! (www.normandie-impressionniste.fr/fr/programme...)

#Science #Mathématiques « Mean Field Games and Some Applications » 🖥️ Les vidéos des conférences de Panagiotis Souganidis (université de Chicago) sont disponibles.  👉 https://tinyurl.com/bnvv4jzd

Unclear where the offence lies: in "we economists", where a fringe sermon abducts the field; in "have done the maths", as if arithmetic laundered ideology; or in "growth is doomed", prophecy in a lab coat. Arrogant ignorance clearly enjoys compound growth!

We economists have done the maths: ‘growth’ is a doomed strategy – there is a better way | Olivier De Schutter and others

Our roadmap has been shaped by experts across the world. We call on political leaders at all levels to use it, says Olivier De Schutter and others

theguardian.com