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Julien Combe

@combeju.bsky.social
937 followers 317 following 342 posts

Professor at CREST - Ecole polytechnique | Affiliated researcher at Institute for Public Policies & CEPR | Market Design | Views are my own | sites.google.com/site/combeju/home

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Julien Combe @combeju.bsky.social · 15/09/2026
Reminds of a joker on econ vs math game theorists: math tell econ their games are too easy, econ tell math their games are useless
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Julien Combe @combeju.bsky.social · 11/09/2026
He will receive the soon to be created Total Peace Prize after the one from Fifa
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Julien Combe @combeju.bsky.social · 11/09/2026
It reminds me of a colleague whose husband works at Renault and he said that Trump has done more to the sells of electric vehicles than most policies so far (aka war with Iran and oil price is similar to a big carbone tax)
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Julien Combe @combeju.bsky.social · 11/09/2026
I removed the name but the email was from an Elsevier employee whi was not from econ, it is the signal that the board is empty at the moment so let's work to leave it that way
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Julien Combe @combeju.bsky.social · 11/09/2026
My answer
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Julien Combe @combeju.bsky.social · 11/09/2026
#EconSky Here it starts, GEB is out to hunt for new editor, please say no Happy to help the new journal that will come put of this :)
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Julien Combe @combeju.bsky.social · 03/09/2026
Une question qu'on se posait la dernière fois est combien de temps il faut pour absorber ce surplus de décès ? J'entends on finit tous par mourir donc ces morts aujourd'hui sont des morts qui n'arrivent pas plus tard. Est ce que ce sont des gens qui seraient décédés dans l'année par exemple ?
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Julien Combe @combeju.bsky.social · 03/09/2026
Micro IS ECON
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Julien Combe @combeju.bsky.social · 03/09/2026
Nice! Now I'm waiting for the micro version :P
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Julien Combe @combeju.bsky.social · 29/08/2026
Do not forget these
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Julien Combe @combeju.bsky.social · 17/08/2026
To be clear, GEB was broader than just theory so even behavioral people have an incentive to create a special journal. It always had a special place, being at the bottleneck between top fields and lower tier journals, getting high quality papers
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Julien Combe @combeju.bsky.social · 16/08/2026
Like TE vs JET at the time, maybe it is time for the entre board to create a new open source journal in theory
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Julien Combe @combeju.bsky.social · 11/08/2026
People stop submitting papers, referees are in vacations
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Julien Combe @combeju.bsky.social · 03/08/2026
But if you get it they fire canons and the students get in line in uniform with swords up to welcome you
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Julien Combe @combeju.bsky.social · 31/07/2026
Equilibre de Nash en Sous Jeux Parfaits
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Julien Combe @combeju.bsky.social · 22/07/2026
What is interesting is that in France for instance, due to the absolute priority which is "anything best for the child", any child born from surrogacy (which is partly illegal in France) abroad has to be officially recognized by the state as child of his French parents
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Julien Combe @combeju.bsky.social · 15/07/2026
Mais l'égalité est un but en soi ? Si un individu consent à renoncer à sa consommation de son plein gré oui il y aura inégalité mais elle sera consentie. A moins d'invoquer une forme de paternalisme et penser que les individus ne prendraient pas les bonnes décisions
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Julien Combe @combeju.bsky.social · 15/07/2026
Pourquoi non échangeables ? J'ai toujours aimé les quotas échangeables comme idée (mettons de coté la difficulté de l'implémentation) cela donne un pouvoir minimal égal à tous mais j'ai du mal à justifier pourquoi je ne devrais pas empêcher quelqu'un de vendre son quota
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Reposted by Julien Combe
Olivier Bos @olivierbos.bsky.social · 14/07/2026
This is the 2nd chapter of Cyril's PhD. He is an outstanding young scholar. He will join the Univ. of Padova next semester. If you're interested in affirmative action, I highly recommend his JMP "Job Matching and Affirmative Action: The Impact of Transfer Policies" drive.google.com/file/d/1pk0Y...
drive.google.com
Job_Matching_and_Affirmative_Action__The_Impact_of_Transfer_Policies_July26.pdf
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Julien Combe @combeju.bsky.social · 13/07/2026
A voir les origines de chaque mais la question se pose des visites en forêt pendant les périodes de risque très élevé
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Julien Combe @combeju.bsky.social · 13/07/2026
Le gros en cours n'est en effet pas la (il est affiché sur Google maps) mais il y a eu plusieurs départs ces derniers jours je crois qu'il y en a eu un en effet aux gorges qui a été maîtrisé
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Julien Combe @combeju.bsky.social · 08/07/2026
Cette nouvelle m'interroge, aurait-on eu le même verdict si les 9 victimes étaient des adultes ? Ca questionne la place de la parole des enfants dans la société et notre capacité à les protéger, en tant que parent cela fait peur
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Julien Combe @combeju.bsky.social · 07/07/2026
idéal: les deux y vont et font campagne l'un contre l'autre
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Julien Combe @combeju.bsky.social · 07/07/2026
Je me demande si je voudrais pas que son ego la fasse tenter avec bracelet dans une campagne toute pourrie et qu'elle perde encore plutôt que de tenter Bardella
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Julien Combe @combeju.bsky.social · 07/07/2026
Je crois avoir lu que si bracelet ou inéligibilité elle ne serait pas candidate mais j'ai perdu la source
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Julien Combe @combeju.bsky.social · 07/07/2026
Car la partie non sursis est considérée comme déjà purgée depuis la dernière condamnation à ce que j'ai compris mais elle aura le bracelet donc elle devra demander une autorisation pour chaque déplacement...
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Julien Combe @combeju.bsky.social · 07/07/2026
#EconConf #EconSky MATCH UP 26 was a great success, thanks to all the speakers and posters for all the great presentations in econ/CS/stats/maths. Thanks to NYU Paris for hosting us and @xpolytechnique.bsky.social @crestumr.bsky.social and @erc.europa.eu for making this happen
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Julien Combe @combeju.bsky.social · 25/06/2026
34 ici donc a ce stade même un biopic de 4h sur Trump je prends si c'est climatisé
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Julien Combe @combeju.bsky.social · 18/06/2026
On peut juger que leurs décisions et travail est mal fait je le conçois, mais le principe de dire les ministres ne travaillent pas en général est un peu extrême c'est à ça que je réagissais (ça touche à un certain populisme)
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Julien Combe @combeju.bsky.social · 18/06/2026
Leur job est d'arbitrer des décisions, quelle est la définition de travail ? Un CEO ne travaille pas non plus ?
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Julien Combe @combeju.bsky.social · 18/06/2026
Je suis toujours sceptique je me rappelle d'un argument que l'erreur est justement que chaque dirigeant européen, plutôt que s'unir, pense "qu'il a une relation privilégiée avec Trump" et "peut le outsmart" et à chaque fois on se fait avoir car il a la mémoire courte et changera d'avis
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Julien Combe @combeju.bsky.social · 09/06/2026
Paris built Le Périphérique which is the modern version of a moat and then never moved
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Julien Combe @combeju.bsky.social · 04/06/2026
I have not experienced reviews from data editors since the AI boom but now that I use it to review my own codes checking whether they do what the paper says they do, I must say that it changes everything for refereeing codes now. Make them check and edit a report that the authors must answer to
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Julien Combe @combeju.bsky.social · 28/05/2026
EC is truly an amazing conference which reinforces the link between econ and CS. It was my first year as SPC, it was nice and I confirm that the papers are terrific!
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Julien Combe @combeju.bsky.social · 26/05/2026
La consolidation UE prend du temps c'est encore un peu tôt pour 2025
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Julien Combe @combeju.bsky.social · 22/05/2026
Je ne remets pas en doute un ressenti de consommateur mais j'en attends un peu plus de nos politiques sur cet arbitrage en contexte de tensions budgétaires
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Julien Combe @combeju.bsky.social · 21/05/2026
c'est peu mais chèque énergie pleaaaase
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Julien Combe @combeju.bsky.social · 20/05/2026
I was not referring to Harris for centrists but these data surely exist?
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Julien Combe @combeju.bsky.social · 20/05/2026
It depends on the dynamics within parties, if more central republicans and democrats feel not represented within their party, there is a space to bring all of them at the middle. We already know the answer for the republican party and you are right that the democrats are not there yet
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Julien Combe @combeju.bsky.social · 20/05/2026
Are the US close to a Macron-event? Both parties are moving to the extreme, there is space in the middle...
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Julien Combe @combeju.bsky.social · 20/05/2026
Hot take: stop hiding your email on your website with images, [dot], [at] and so on. With IA now, a true spam scrapper is able to recover everything so not sure it helps reducing spams (+ emails screen well spams) you are just annoying someone who wants to contact you but this is maybe the goal?
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Julien Combe @combeju.bsky.social · 12/05/2026
#EconSky #EconConf The deadline for the early registration fees for MATCH UP 26 is appraoching! Consider joining this great workshop, see the list of accepted papers and posters as well as the preliminary program on the website: matchup2026.crest.science
matchup2026.crest.science
MATCH-UP 2026 – 8th International Workshop on Matching Under Preferences
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Julien Combe @combeju.bsky.social · 12/05/2026
These medical public health observational studies give us an infinite amount of examples for an intro course in econometrics about correlation vs causality, in a sense they have a positive externality in showing what one shouldn't do
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Julien Combe @combeju.bsky.social · 03/05/2026
@undercoverhist.bsky.social
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Reposted by Julien Combe
Alex Teytelboym @t8el.bsky.social · 27/04/2026
We're pleased to announce that five @aeajournals.bsky.social journals (AER, Insights, AEJ:Micro/Policy/Applied) + @qe-editors.bsky.social joined @acmsigecom.bsky.social EC'26 forward-to-journal option this year. You can now forward your EC reviews to 23 journals: ec26.sigecom.org/call-for-con... ⏭️
ec26.sigecom.org
Call for Papers - EC 2026
Authors must submit abstracts by February 2 and full papers by February 9. Papers submitted to EC’26 must select several content areas. The list of content areas can be found …
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Julien Combe @combeju.bsky.social · 29/04/2026
media.tenor.com
a cartoon robot is saying it 's even worse than i thought it would be
ALT: a cartoon robot is saying it 's even worse than i thought it would be
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Julien Combe @combeju.bsky.social · 25/04/2026
Vieille France
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Julien Combe @combeju.bsky.social · 22/04/2026
Real life high carton tax experiment
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Julien Combe @combeju.bsky.social · 15/04/2026
Registrations are open at matchup2026.crest.science Early registration deadline: May 15 Registration deadline: June 15 Registration fee is 150€ and reduced to 60€ for PhDs/postdocs Includes coffee breaks, lunches, cocktail diner, diner on a boat on the Seine
matchup2026.crest.science
MATCH-UP 2026 – 8th International Workshop on Matching Under Preferences
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Julien Combe @combeju.bsky.social · 15/04/2026
#EconConf #EconSky We just sent the paper notifications for #MATCHUP26 thanks to all for the many great submissions and to PC reviewers for their great job! 93 submissions for 24 talks and 19 posters. This was more than expected and we ended up rejecting many very good papers More details below
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