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Olivier Godechot

@oliviergodechot.bsky.social
1.2K followers 224 following 107 posts

Social scientist

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Olivier Godechot @oliviergodechot.bsky.social · 09/10/2026
Questions on the not-so-open OpenAI maths : www.scientificamerican.com/article/math...
scientificamerican.com
Mathematicians marvel, and grumble, at OpenAI’s trove of new results
The “slop drop” contains a number of groundbreaking proofs, but how it was generated remains unclear and contentious
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Olivier Godechot @oliviergodechot.bsky.social · 04/09/2026
Customers, you are not alone in the supermarket! You increasingly share space with E-commerce delivery workers. Discover how they work! academic.oup.com/ser/advance-...
academic.oup.com
“The Amazon warehouse within my store”: e-commerce adoption and conflicted industrialization in Southern California’s grocery industry
Abstract. The growth of grocery e-commerce has commodified tasks previously done by customers. Scholars have studied the labor conditions of new e-commerce
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Olivier Godechot @oliviergodechot.bsky.social · 03/09/2026
No, I did not. I heard from Malte that she passed away recently.
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Olivier Godechot @oliviergodechot.bsky.social · 03/09/2026
"Marriage as a ressource" from Niccolo Armandola, Malte Doehne and Katja Rost is the first SER paper for which I was the SER associate editor. It will plunge you in the 17-18th elite century families of Basel. The paper is dedicated to the memory of Katja Rost. academic.oup.com/ser/advance-...
academic.oup.com
Marriage as a resource: family marriage strategies among elites in response to institutional change
Abstract. Marital sorting is commonly used by elites to prevent status erosion and maintain exclusivity. However, elites are affected by shifts in the soci
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Socio-Economic Review @socioeconreview.bsky.social · 30/07/2026
Call for Special Issue Proposals – Socio-Economic Review (SER) 📅 Proposal deadline: September 30, 2026 For the complete call, proposal requirements, and submission guidelines, please visit: academic.oup.com/ser/pages/ca...
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Daniele Girardi @dgirardi.bsky.social · 06/08/2026
🚨New version (1.0.3) of *lpdid* STATA command, which implements Local Projections Difference-in-Differences🚨 ssc install lpdid, replace The update fixes 2 bugs that could arise when using pmd() option in datasets with missing values or repeated oneoff treatments. No change outside those settings.
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Olivier Godechot @oliviergodechot.bsky.social · 16/07/2026
While struggling to understand why a minor field correction divided my estimates by 2.5… I discovered today that log function in R/duckb is a log_10 one !!!
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Olivier Godechot @oliviergodechot.bsky.social · 04/07/2026
Don't say: this estimate is not causal. Rather say: I don't identify my causal effect well.
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Olivier Godechot @oliviergodechot.bsky.social · 08/06/2026
Sometimes (human/animal) social groups split into two (or more). Team departures in corporate firms, political party splits, religious schisms, software forks, etc. Let's study this. I hire a predoc or a postdoc on social group splits. www.sciencespo.fr/axpo/events/...
sciencespo.fr
Call for Applications AxPo Research Assistant/Postdoc
AxPo Research Assistant/Postdoc Application 2026AxPo Research Assistant/Postdoc Application 2026Research Assistant job application for Research Group on Social Group Splits at AxPo, Sciences Po, Paris...
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Olivier Godechot @oliviergodechot.bsky.social · 25/05/2026
@joefrancis.bsky.social's Damascene conversion on the merits and limits of AI for peer reviewing is worth a read: thepoorrichworld.substack.com/p/reflection...
thepoorrichworld.substack.com
Reflections on My Adventures in Replication
My attempts to demonstrate the problems in the knowledge production system have led me to a Damascene conversion on the need for peer review
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Olivier Godechot @oliviergodechot.bsky.social · 09/05/2026
Interesting proposal. But submissions are not centralized. If you use the number of publications as a proxy, the problems would arise when defining this magic cap, which would depend on the field, type of research, number of coauthors, status, etc. It wouldn't work for entrants...
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Olivier Godechot @oliviergodechot.bsky.social · 08/05/2026
This paper comes timely and raises many questions. At Socio-Economic Review, where I serve as associate editor, we are currently discussing as in many journals which AI policy to adopt. Should we ban AI (beyond its copy-editing role)? Should we accept it as long as the papers are good?
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Olivier Godechot @oliviergodechot.bsky.social · 27/04/2026
With some bsky coauthors @realnilsneumann.bsky.social @lassefolke.bsky.social @aresherman.bsky.social @lippenyi.bsky.social @daventholt.bsky.social @ninabandelj.bsky.social @andrewpenner.bsky.social @msafi.bsky.social @dont-d.bsky.social and other non bksy coauthors.
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Olivier Godechot @oliviergodechot.bsky.social · 27/04/2026
We demonstrate that financial cities are increasingly overrepresented in national and local top earnings and that earnings for financiers in these cities explain 28% of this growing disparity.
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Olivier Godechot @oliviergodechot.bsky.social · 27/04/2026
Using fine-grain administrative datasets from ten countries, we compare the wage structures of financial cities (home to the national stock exchange) with those of the most comparable non-financial cities (e.g., Paris vs Lyon, Tokyo vs Osaka, Toronto vs Montreal).
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Olivier Godechot @oliviergodechot.bsky.social · 27/04/2026
Others claim that cities have the mysterious virtue of enhancing workers’ productivity. In this Nature Cities paper, our COIN team offers a simpler explanation. These cities are 'financial cities', where top earnings are inflated by rents in the financial labor market www.nature.com/articles/s44...
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Olivier Godechot @oliviergodechot.bsky.social · 27/04/2026
The growing earnings gap between global and/or superstar cities and their hinterlands is a source of increasing social discontent. Some argue that this concentration is due to these cities' global coordination role in a globalised economy.
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Ulysse Lojkine @ulojkine.bsky.social · 23/04/2026
I am super happy to share the program of this one-day workshop on Outsourced Workers at Sciences Po on June 29. www.sciencespo.fr/axpo/events/...
Inter-Fiorm Hierarchy and Worker Outcomes: Perspectives from Economics and Sociology. Program
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Olivier Godechot @oliviergodechot.bsky.social · 15/04/2026
(With @ulojkine.bsky.social)
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Olivier Godechot @oliviergodechot.bsky.social · 14/04/2026
More details: github.com/oliviergodec... Special thanks to @cdechaisemartin.bsky.social @dgirardi.bsky.social @pedrosantanna.bsky.social for clarifying chats! Package still in debug mode—feedback welcome!
github.com
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Olivier Godechot @oliviergodechot.bsky.social · 14/04/2026
Execution time on 4M simulated obs? Pretty fast.
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Olivier Godechot @oliviergodechot.bsky.social · 14/04/2026
Our lpdidcsa package does this: • Simple LP-DiD • Reweighted LP-DiD • Adjusted regression LP-DiD • IPW LP-DiD • Callaway & @pedrosantanna.bsky.social cohort treatment effects in a local projection framework with IPW.
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Olivier Godechot @oliviergodechot.bsky.social · 14/04/2026
Tiny tweak to LP-DiD: inverse probability weighting (IPW). Goal? Make control group resemble treated group. Result: Estimate equally weighted ATTs faster than “adjusted regression.”
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Olivier Godechot @oliviergodechot.bsky.social · 14/04/2026
In our paper, we use @arindube.bsky.social @dgirardi.bsky.social et al. (2025) LP-DiD method. Example: The horizontal 0 line = “control” group; blue bars = “treated” group. Treatment: outsourcing (strange medicine). Before (left): earnings evolved similarly. After 0 (right): 12% drop.
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Olivier Godechot @oliviergodechot.bsky.social · 14/04/2026
- So? Second goodies? - github.com/oliviergodec... - What’s that? - A staggered event study DiD R package. - Again?! - Yep—last event in a series of staggered DiD solutions. - Explain? - Unroll the thread…
github.com
GitHub - oliviergodechot/lpdidcsa
Contribute to oliviergodechot/lpdidcsa development by creating an account on GitHub.
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World Inequality Lab @wid.world · 13/04/2026
Outsourced workers in low-skilled service jobs (cleaning, catering, security) in 🇫🇷 face a substantial earnings penalty—about 10 log points—persisting for up to 7 years after outsourcing, find @ulojkine.bsky.social & @oliviergodechot.bsky.social in new study. More findings▶️ wid.world/news-article...
wid.world
Cutting hours through outsourcing - WID - World Inequality Database
Cutting hours through outsourcing Olivier Godechot and Ulysse Lojkine study the effects of on-site outsourcing of low-skilled service jobs (cleaning, catering, security) in France.
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Olivier Godechot @oliviergodechot.bsky.social · 09/04/2026
Enjoy!
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Olivier Godechot @oliviergodechot.bsky.social · 09/04/2026
And the SAS and R scripts for chaining BTS / DADS postes are available here : olivier.godechot.free.fr/hopfichiers/...
olivier.godechot.free.fr
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Olivier Godechot @oliviergodechot.bsky.social · 09/04/2026
Here's the improvement in the number of individuals chained :
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Olivier Godechot @oliviergodechot.bsky.social · 09/04/2026
1/ We handle better workers' ages, which allows to do a perfect match on birth years. 2/ We leverage information on unemployment benefits between 2003 and 2015. This enables to continue chaining workers who are unemployed during a full calendar year. Sadly, this information disappears after 2015
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Olivier Godechot @oliviergodechot.bsky.social · 09/04/2026
Beyond the content on outsourcing, there are two additional goodies of potential interest for many social scientists. Here's the first for CASD fans (as us) : we improved the Babet-Godechot-Palladino chaining of the French BTS (a.k.a. DADS).
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Olivier Godechot @oliviergodechot.bsky.social · 09/04/2026
And also all labour social scientists !
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Ulysse Lojkine @ulojkine.bsky.social · 09/04/2026
New @wid.world working paper with @oliviergodechot.bsky.social
Cutting hours through outsourcing
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Olivier Godechot @oliviergodechot.bsky.social · 18/03/2026
PS: our data and code is available here: olivier.godechot.free.fr/hopfichiers/...
olivier.godechot.free.fr
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Olivier Godechot @oliviergodechot.bsky.social · 18/03/2026
This study invites debate on how to (self-)regulate recruitment practices to address this invisible but significant inequality. [n/n] (And, the French version, published in November, is here: laviedesidees.fr/Le-localisme...)
laviedesidees.fr
Le localisme universitaire, nouvelles évaluations
En analysant près de 8 000 recrutements à la maîtrise de conférences en France entre 2017 et 2024, Olivier Godechot, Rachel Issiakou, Yann Renisio et Adrien Rougier reviennent sur la question ancienne...
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Olivier Godechot @oliviergodechot.bsky.social · 18/03/2026
Academic inbreeding creates invisible inequality: Over half of applicants were on the market during years when their former department had no openings. As a result, their chance of landing a job was just 6.6%, compared to 10.2% for those with the inbred option. [9/n]
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Olivier Godechot @oliviergodechot.bsky.social · 18/03/2026
Part of this phenomenon stems from departments protecting their own PhDs against external competition—especially when their graduates struggle to find positions elsewhere. [8/n]
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Olivier Godechot @oliviergodechot.bsky.social · 18/03/2026
Of course, geographical distance and candidate preferences play a role. Yet even after controlling for these factors, the preference for inbred candidates remains strong. [7/n]
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Olivier Godechot @oliviergodechot.bsky.social · 18/03/2026
Academic inbreeding declined during the 2000s, thanks to national and local initiatives—such as the 2008 reform of recruitment committees and mathematicians’ deliberate policy to ban the practice. [6/n]
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Olivier Godechot @oliviergodechot.bsky.social · 18/03/2026
Parisian universities, which produce many PhD graduates, generally show lower inbreeding rates on our odds ratio scale than smaller provincial ones. However, there are exceptions: UTC Compiègne and Lyon I score very low, while Paris 2 (Panthéon-Assas) and CNAM score very high. [5/n]
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Olivier Godechot @oliviergodechot.bsky.social · 18/03/2026
Inbreeding varies by discipline—but not along the lines of natural vs. social sciences. Instead, fundamental sciences tend to be less inbred, while applied sciences are more so. [4/n]
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Olivier Godechot @oliviergodechot.bsky.social · 18/03/2026
Our key contribution is reconstructing the competitive landscape. Using the simplifying assumption that every candidate applies to every open position in their discipline, we find that inbred applicants are 9.5 times more likely to be recruited than outbred potential candidates. [3/n]
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Olivier Godechot @oliviergodechot.bsky.social · 18/03/2026
We combined three datasets: 1) 8,000 “maîtres de conférences” (assistant professors) recruited between 2017–2024, 2) 108,000 qualifications (the first national screening step authorizing candidates to apply) from 2012–2024, and 3) 312,000 PhDs defended between 1999–2024. [2/n]
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Olivier Godechot @oliviergodechot.bsky.social · 18/03/2026
Academic inbreeding—when a university hires its own former PhD students as assistant professors—is widespread in many countries, yet it often sparks heated debate. In this paper, we assess its impact on the fairness of assistant professor recruitment in France.[1/n] booksandideas.net/Academic-inb...
booksandideas.net
Academic inbreeding: new estimates
By analyzing nearly 8,000 recruitments for assistant professor positions in France between 2017 and 2024, Olivier Godechot, Rachel Issiakou, Yann Renisio, and Adrien Rougier revisit the long-standing ...
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A̴̙̅Ǩ̸̫A̵̭̍ ̵̖̃F̴̛͈ȧ̸͙b̶̦́ï̵͙a̵̜̾n̸̰͠ ̸̘̾M̷̟͠u̴͉̇n̷̥͝i̷̻͆e̸̮̾ŝ̵̲a̴̹͌ @provokedeconomy.bsky.social · 29/01/2026
Fabian Muniesa - 'Paranoid Finance' @ Sciences Po Paris (AxPo / CEE) 19.02.2026 www.sciencespo.fr/centre-etude...
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Olivier Godechot @oliviergodechot.bsky.social · 25/01/2026
In Minneapolis the icy Good was pretti And Pretti was good But shot in cold blood For against what they stood
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Olivier Godechot @oliviergodechot.bsky.social · 01/01/2026
Your new year party is over. It is time to complete.
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Ulysse Lojkine @ulojkine.bsky.social · 31/12/2025
Publication, with Simon Bittmann: Chains of Exploitation: A Theoretical and Empirical Exploration in Theory & Social Inquiry
This paper sets a new empirical agenda for exploitation theory, through the notion of chains. Exploitation generally offers three attractive properties compared to more commonly used concepts—inequality and domination—in that it is simultaneously distributive, relational, and openly counterfactual, yet it remains an underexplored notion. While both Marxist and neoclassical traditions focus on dyadic relations—either worker-employer or through market exchange—most exploitative situations bear several relational components, where agents can simultaneously stand as exploited and exploiters. Building on a sociological-relational tradition, we identify four chains—I (connected), L (hinged), V (dual) and C (complicit)—which we argue represent the elementary structures of exploitation. We then contend that this meso-level approach, complementary to individual-transactional and structural accounts, bears potential for sociological analysis and then explore how these chains materialize in various economic sites—within the production unit, on the market, in the domestic sphere, and by the state.
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La Vie des idées @laviedesidees.bsky.social · 16/12/2025
L'adoption du mode de scrutin proportionnel apparaît aujourd'hui, selon deux politistes, comme une condition nécessaire pour redonner à la démocratie française la capacité de renouer avec des gouvernements représentatifs, stables et opérationnels.
laviedesidees.fr
La proportionnelle : une urgence démocratique
L'adoption du mode de scrutin proportionnel apparaît aujourd'hui, selon deux politistes, comme une condition nécessaire pour redonner à la démocratie française la capacité de renouer avec des gouvernements représentatifs, stables et opérationnels.
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Olivier Godechot @oliviergodechot.bsky.social · 13/12/2025
C'est plutôt du fait des pattes trop palmées qu'il est gauche et veule.
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