Julien Lie-Panis
@jliep.bsky.social
Pinned
Julien Lie-Panis
@jliep.bsky.social
· Dec 16
PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
www.pnas.org
How do institutions enable large-scale cooperation? 🤝
Institutions promote cooperation but depend on cooperation to function. In a new study in @pnas.org,
@jbaptistandre.bsky.social, N. Baumard, @lfitouchi.bsky.social and I explore this paradox. 🧵
👉 www.pnas.org/doi/10.1073/...
Institutions promote cooperation but depend on cooperation to function. In a new study in @pnas.org,
@jbaptistandre.bsky.social, N. Baumard, @lfitouchi.bsky.social and I explore this paradox. 🧵
👉 www.pnas.org/doi/10.1073/...
Reposted by Julien Lie-Panis
Big congratulations to Dr Nikhil Sharma on receiving the Kiel Life Science Postdoc Award 2025! His outstanding work in theoretical biology and evolutionary graph theory makes us proud. Well deserved! 👏 #KLS #MPIEvolBio
www.evolbio.mpg.de/3847270/kiel...
(Photo: Christian Urban, Kiel University)
www.evolbio.mpg.de/3847270/kiel...
(Photo: Christian Urban, Kiel University)
November 26, 2025 at 7:10 AM
Big congratulations to Dr Nikhil Sharma on receiving the Kiel Life Science Postdoc Award 2025! His outstanding work in theoretical biology and evolutionary graph theory makes us proud. Well deserved! 👏 #KLS #MPIEvolBio
www.evolbio.mpg.de/3847270/kiel...
(Photo: Christian Urban, Kiel University)
www.evolbio.mpg.de/3847270/kiel...
(Photo: Christian Urban, Kiel University)
Reposted by Julien Lie-Panis
Happy to share our latest study published in PNAS.
Using data from 274,316 French students, we find that lower-SES students are less likely to wait for better university offers, even when waiting would lead to more prestigious or better-fit programs.
www.pnas.org/doi/10.1073/...
Using data from 274,316 French students, we find that lower-SES students are less likely to wait for better university offers, even when waiting would lead to more prestigious or better-fit programs.
www.pnas.org/doi/10.1073/...
Waiting time during admission procedures increases social inequalities in higher education | PNAS
Many domains in life require people to wait to access better outcomes, such as waiting
in line to access prized tickets for a show, waiting to obta...
www.pnas.org
November 26, 2025 at 9:27 AM
Happy to share our latest study published in PNAS.
Using data from 274,316 French students, we find that lower-SES students are less likely to wait for better university offers, even when waiting would lead to more prestigious or better-fit programs.
www.pnas.org/doi/10.1073/...
Using data from 274,316 French students, we find that lower-SES students are less likely to wait for better university offers, even when waiting would lead to more prestigious or better-fit programs.
www.pnas.org/doi/10.1073/...
Reposted by Julien Lie-Panis
🎉 New preprint: Bayesian Competence Inference guides Knowledge Attribution and Information search
If someone knows that Venus is the only planet in the Solar System that rotates clockwise, will they also know what Earth’s only natural satellite is? What about which planets have no moons at all?
If someone knows that Venus is the only planet in the Solar System that rotates clockwise, will they also know what Earth’s only natural satellite is? What about which planets have no moons at all?
November 13, 2025 at 5:16 PM
🎉 New preprint: Bayesian Competence Inference guides Knowledge Attribution and Information search
If someone knows that Venus is the only planet in the Solar System that rotates clockwise, will they also know what Earth’s only natural satellite is? What about which planets have no moons at all?
If someone knows that Venus is the only planet in the Solar System that rotates clockwise, will they also know what Earth’s only natural satellite is? What about which planets have no moons at all?
Reposted by Julien Lie-Panis
"individuals are usually conservative in the size of their lies to prevent punishment from interactions partners, and to maintain a reputation as honest interaction partners"
(PDF) Why are lies small?
PDF | Deception is common, yet lies are typically small and not easily spotted. The dominant explanations for why this is the case are psychological in... | Find, read and cite all the research you ne...
www.researchgate.net
November 10, 2025 at 5:24 PM
"individuals are usually conservative in the size of their lies to prevent punishment from interactions partners, and to maintain a reputation as honest interaction partners"
Reposted by Julien Lie-Panis
In case you don't know already, the journal Open Mind has a Bluesky account that automatically posts new papers:
@openmindjournal.bsky.social
The journal is diamond open access (free to read, free to publish) thanks to the support of MIT Press, Harvard Library, & MIT Library.
@openmindjournal.bsky.social
The journal is diamond open access (free to read, free to publish) thanks to the support of MIT Press, Harvard Library, & MIT Library.
October 24, 2025 at 12:03 PM
In case you don't know already, the journal Open Mind has a Bluesky account that automatically posts new papers:
@openmindjournal.bsky.social
The journal is diamond open access (free to read, free to publish) thanks to the support of MIT Press, Harvard Library, & MIT Library.
@openmindjournal.bsky.social
The journal is diamond open access (free to read, free to publish) thanks to the support of MIT Press, Harvard Library, & MIT Library.
Reposted by Julien Lie-Panis
osf.io/preprints/ps...
Preprint: Jan Pfänder and Hugo Mercier "The rational impression account of trust in science"
Preprint: Jan Pfänder and Hugo Mercier "The rational impression account of trust in science"
October 12, 2025 at 11:03 AM
osf.io/preprints/ps...
Preprint: Jan Pfänder and Hugo Mercier "The rational impression account of trust in science"
Preprint: Jan Pfänder and Hugo Mercier "The rational impression account of trust in science"
Reposted by Julien Lie-Panis
In a new paper, we show from longitudinal UK and France data that income volatility (fluctatuations month to month) are bad for mental and general health. And it is much badder than you would expect given the lowness of the low months:
doi.org/10.1016/j.ss...
doi.org/10.1016/j.ss...
Redirecting
doi.org
October 11, 2025 at 9:25 AM
In a new paper, we show from longitudinal UK and France data that income volatility (fluctatuations month to month) are bad for mental and general health. And it is much badder than you would expect given the lowness of the low months:
doi.org/10.1016/j.ss...
doi.org/10.1016/j.ss...
Reposted by Julien Lie-Panis
M.I.T. Rejects a White House Offer for Special Funding Treatment
www.nytimes.com
October 10, 2025 at 5:19 PM
Reposted by Julien Lie-Panis
Resistance to authoritarianism is a coordination game. That's why universities and law firms and nonprofits can't let themselves be picked off one by one. www.nytimes.com/2025/10/08/o...
Opinion | You Beat Trumpism by Banding Together. It’s as Hard and as Simple as That.
www.nytimes.com
October 8, 2025 at 1:01 PM
Resistance to authoritarianism is a coordination game. That's why universities and law firms and nonprofits can't let themselves be picked off one by one. www.nytimes.com/2025/10/08/o...
Reposted by Julien Lie-Panis
My very first paper has just been published in Nature Human Behaviour!
In it, we demonstrate that both a chatbot and a more traditional pedagogical intervention can help improve adolescents' knowledge of vaccines and their attitudes towards vaccination.
In it, we demonstrate that both a chatbot and a more traditional pedagogical intervention can help improve adolescents' knowledge of vaccines and their attitudes towards vaccination.
September 10, 2025 at 2:09 PM
My very first paper has just been published in Nature Human Behaviour!
In it, we demonstrate that both a chatbot and a more traditional pedagogical intervention can help improve adolescents' knowledge of vaccines and their attitudes towards vaccination.
In it, we demonstrate that both a chatbot and a more traditional pedagogical intervention can help improve adolescents' knowledge of vaccines and their attitudes towards vaccination.
Reposted by Julien Lie-Panis
Ever wanted to read about an old problem almost nobody cares about anymore?
Well, I wrote about it.
🧵
Well, I wrote about it.
🧵
September 24, 2025 at 8:54 AM
Ever wanted to read about an old problem almost nobody cares about anymore?
Well, I wrote about it.
🧵
Well, I wrote about it.
🧵
Reposted by Julien Lie-Panis
#HBES2026 abstract submissions are live! More exciting details to come soon.
Arrive early for @ces2026.bsky.social
@humbehevosoc.bsky.social
Arrive early for @ces2026.bsky.social
@humbehevosoc.bsky.social
We’re delighted to share that the 37th annual Human Behavior and Evolution Society conference (HBES2026) website is now live!
#HBES2026
#HBES2026
September 22, 2025 at 3:46 PM
#HBES2026 abstract submissions are live! More exciting details to come soon.
Arrive early for @ces2026.bsky.social
@humbehevosoc.bsky.social
Arrive early for @ces2026.bsky.social
@humbehevosoc.bsky.social
Reposted by Julien Lie-Panis
📢 Apply to our (2-year) research fellowships at @iast.fr
Join a multidisciplinary, interdisciplinary, transdisciplinary, and indisciplinary group of scholars in Toulouse, walkable/cyclable pink city of chocolatines in the South of France.
Deadline: November 15, 2025.
www.iast.fr/research-fel...
Join a multidisciplinary, interdisciplinary, transdisciplinary, and indisciplinary group of scholars in Toulouse, walkable/cyclable pink city of chocolatines in the South of France.
Deadline: November 15, 2025.
www.iast.fr/research-fel...
Research Fellowships
Each year, IAST invites applications for post-doctoral Research Fellowships, which offer candidates an opportunity to devote themselves full-time to their research at the start of their careers. Fello...
www.iast.fr
September 22, 2025 at 7:44 AM
📢 Apply to our (2-year) research fellowships at @iast.fr
Join a multidisciplinary, interdisciplinary, transdisciplinary, and indisciplinary group of scholars in Toulouse, walkable/cyclable pink city of chocolatines in the South of France.
Deadline: November 15, 2025.
www.iast.fr/research-fel...
Join a multidisciplinary, interdisciplinary, transdisciplinary, and indisciplinary group of scholars in Toulouse, walkable/cyclable pink city of chocolatines in the South of France.
Deadline: November 15, 2025.
www.iast.fr/research-fel...
Reposted by Julien Lie-Panis
"From this point of view, fairness really may be a universal law."
Morality Is in Our Brain, in Our Genes, and Even in the Structure of the Universe
In defense of "Natural Law", Nicholas Baumard explains how modern scientific understanding of evolution actually supports the idea of a moral sense.
humansandnature.org
September 19, 2025 at 9:54 PM
"From this point of view, fairness really may be a universal law."
Reposted by Julien Lie-Panis
the functional form of moral judgment is (sometimes) the nash bargaining solution
new preprint👇
new preprint👇
May 20, 2025 at 3:08 PM
the functional form of moral judgment is (sometimes) the nash bargaining solution
new preprint👇
new preprint👇
Reposted by Julien Lie-Panis
We often hear from reviewers: "what about demand effects?" So we developed a method to eliminate them. Something weird happened during testing: We couldn’t detect demand effects in the first place! (1/8)
September 15, 2025 at 5:19 PM
We often hear from reviewers: "what about demand effects?" So we developed a method to eliminate them. Something weird happened during testing: We couldn’t detect demand effects in the first place! (1/8)
Reposted by Julien Lie-Panis
1/ Thrilled to share that my main PhD article has just been published in Nature Human Behaviour! 🎉
👉 “A randomised controlled trial on the effect of administrative burden and information costs on social inequalities in early childcare access in France” rdcu.be/eFAEA
👉 “A randomised controlled trial on the effect of administrative burden and information costs on social inequalities in early childcare access in France” rdcu.be/eFAEA
A randomized controlled trial on the effect of administrative burden and information costs on social inequalities in early childcare access in France
Nature Human Behaviour - This RCT finds that providing information and support to target cognitive and behavioural barriers eliminates early childcare application gaps for low-income and immigrant...
rdcu.be
September 11, 2025 at 10:37 AM
1/ Thrilled to share that my main PhD article has just been published in Nature Human Behaviour! 🎉
👉 “A randomised controlled trial on the effect of administrative burden and information costs on social inequalities in early childcare access in France” rdcu.be/eFAEA
👉 “A randomised controlled trial on the effect of administrative burden and information costs on social inequalities in early childcare access in France” rdcu.be/eFAEA
Reposted by Julien Lie-Panis
I'm giving a free book talk next Wednesday at the Harvard Museum of Natural History. Come by if you're in the Boston area!
September 5, 2025 at 5:03 PM
I'm giving a free book talk next Wednesday at the Harvard Museum of Natural History. Come by if you're in the Boston area!
Reposted by Julien Lie-Panis
👏 Huge congrats to @audeber.bsky.social, group leader and head of our Molecular Diversity of Microbes lab, on being named a 2025 Vallee Scholar! Her pioneering work on ancestral immunity opens new perspectives for biomedical innovation. 🔬🌍
@valleefoundation.bsky.social
#Science #Immunity
@valleefoundation.bsky.social
#Science #Immunity
September 2, 2025 at 9:44 AM
👏 Huge congrats to @audeber.bsky.social, group leader and head of our Molecular Diversity of Microbes lab, on being named a 2025 Vallee Scholar! Her pioneering work on ancestral immunity opens new perspectives for biomedical innovation. 🔬🌍
@valleefoundation.bsky.social
#Science #Immunity
@valleefoundation.bsky.social
#Science #Immunity
Reposted by Julien Lie-Panis
Why do societies reliably develop strikingly similar traditions like dance songs, hero stories, shamanism & justice institutions?
In a new BBS target article, I propose a theory for such "super-attractors" + cultural evolution more broadly. Now open for commentary: www.cambridge.org/core/journal...
In a new BBS target article, I propose a theory for such "super-attractors" + cultural evolution more broadly. Now open for commentary: www.cambridge.org/core/journal...
August 25, 2025 at 2:47 PM
Why do societies reliably develop strikingly similar traditions like dance songs, hero stories, shamanism & justice institutions?
In a new BBS target article, I propose a theory for such "super-attractors" + cultural evolution more broadly. Now open for commentary: www.cambridge.org/core/journal...
In a new BBS target article, I propose a theory for such "super-attractors" + cultural evolution more broadly. Now open for commentary: www.cambridge.org/core/journal...
Reposted by Julien Lie-Panis
This week, we discuss the evolution of cooperation with Pat Barclay.
youtu.be/-cHqagwF1yY?...
podcasts.apple.com/us/podcast/e...
www.podbean.com/eas/pb-f5gtf...
youtu.be/-cHqagwF1yY?...
podcasts.apple.com/us/podcast/e...
www.podbean.com/eas/pb-f5gtf...
Cooperation with Pat Barclay
YouTube video by Evolutionary Psychology (The Podcast)
youtu.be
August 19, 2025 at 12:15 PM
This week, we discuss the evolution of cooperation with Pat Barclay.
youtu.be/-cHqagwF1yY?...
podcasts.apple.com/us/podcast/e...
www.podbean.com/eas/pb-f5gtf...
youtu.be/-cHqagwF1yY?...
podcasts.apple.com/us/podcast/e...
www.podbean.com/eas/pb-f5gtf...
Reposted by Julien Lie-Panis
Very excited to see this published!
📈New meta-analysis reveals when "moral licensing" really happens. After good deeds, people act less morally only when being watched by others, not when alone. This explains why many online studies failed to replicate the effect.
Read more in #PSPB: ow.ly/YFIp50WmjYE
Read more in #PSPB: ow.ly/YFIp50WmjYE
July 23, 2025 at 12:38 PM
Very excited to see this published!
Reposted by Julien Lie-Panis
Our new paper is out in PNAS: "Evolving general cooperation with a Bayesian theory of mind"!
Humans are the ultimate cooperators. We coordinate on a scale and scope no other species (nor AI) can match. What makes this possible? 🧵
www.pnas.org/doi/10.1073/...
Humans are the ultimate cooperators. We coordinate on a scale and scope no other species (nor AI) can match. What makes this possible? 🧵
www.pnas.org/doi/10.1073/...
Evolving general cooperation with a Bayesian theory of mind | PNAS
Theories of the evolution of cooperation through reciprocity explain how unrelated
self-interested individuals can accomplish more together than th...
www.pnas.org
July 22, 2025 at 6:04 AM
Our new paper is out in PNAS: "Evolving general cooperation with a Bayesian theory of mind"!
Humans are the ultimate cooperators. We coordinate on a scale and scope no other species (nor AI) can match. What makes this possible? 🧵
www.pnas.org/doi/10.1073/...
Humans are the ultimate cooperators. We coordinate on a scale and scope no other species (nor AI) can match. What makes this possible? 🧵
www.pnas.org/doi/10.1073/...
Reposted by Julien Lie-Panis
Arthur has written a wonderful, clear, super helpful introduction to contractualism as a foundation for moral psychology. Perfect for getting up to speed, teaching, a desk reference, or a sunny day at the beach. wires.onlinelibrary.wiley.com/doi/10.1002/...
Contractualist Moral Cognition: From the Normative to the Descriptive at Three Levels of Analysis
Visual summary of the paper. Taking inspiration from the contractualist tradition in moral philosophy is helpful to better understand morality at three interrelated levels of analysis: Its evolutiona...
wires.onlinelibrary.wiley.com
July 11, 2025 at 2:33 PM
Arthur has written a wonderful, clear, super helpful introduction to contractualism as a foundation for moral psychology. Perfect for getting up to speed, teaching, a desk reference, or a sunny day at the beach. wires.onlinelibrary.wiley.com/doi/10.1002/...