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Julien Lie-Panis

@jliep.bsky.social

I study the psychology of large-scale cooperation: how human minds give rise to the rules, norms, and institutions that make societies possible. https://jliep.github.io/

26 Posts273 Follower427 Folgt
Alejandro Pérez Velilla@apvelilla.bsky.social · 6d ago

Out now in PNAS. www.pnas.org/doi/10.1073/... Thank you to all peers and colleagues who provided invaluable feedback during the process!

A demographic theory of similarity-biased social learning | PNAS

We develop a demographic theory of similarity-biased social learning that formalizes our understanding of when and why individuals should preferent...

pnas.org

Alejandro Pérez Velilla@apvelilla.bsky.social · 5mo ago

New preprint with @psmaldino.bsky.social on the evolution of similarity-biased learning: osf.io/preprints/so... This mathematical treatment both simplifies and extends our previous simulation treatment of the subject: www.cambridge.org/core/journal...

Michael Muthukrishna@michael.muthukrishna.com · last wk.

🚨 PNAS paper: "Indirect reciprocity undermines indirect reciprocity destabilizing large-scale cooperation" w/ Eric Schnell How do we achieve global cooperation on climate or conflict reduction? The problem isn't selfishness as much as it is cooperation itself - at a smaller scale. 1/

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Max Taylor-Davies@maxtaylordavies.bsky.social · last wk.

🍄 New paper out in PLOS Computational Biology! 🍄 I, and others, have previously drawn a comparison between the classic “cost-avoidance” argument for social learning and the central idea of resource rationality... (1/8)

Evolution Students@ssegrad.bsky.social · last wk.

1/4 In today's funding climate, every grant and fellowship matters. Based on feedback from our GSAC Community Check-In Survey, we're building a growing hub of graduate & postdoctoral funding opportunities and job boards to make them easier to find. 🧵

Funding and job board curated by Dieter Lukas and Pro Manna
James Holland Jones@juemos.bsky.social · last wk.

Do you study human ecology, human behavior, or human institutions? Is your work relevant to climate change, adaptation, or sustainability? Join us at Stanford! 🌲🤓🌲 My department will be running a junior search in Environmental Behavioral Sciences this year. Happy to answer any questions.

Assistant Professor in Environmental Social Sciences, Stanford Doerr School of Sustainability (Environmental Behavioral Sciences) - Stanford University, California, United States

Stanford University invites applications for a tenure-track Assistant Professor in the field of Environmental Behavioral Sciences within the Department of Environmental Social Sciences. The scope of t...

facultypositions.stanford.edu

Paul Smaldino@psmaldino.bsky.social · 2w ago

Want to do a PhD to work on models of opinion dynamics and the inequalities of information flow, with an emphasis on climate change and climate policy? Apply by October 15 to work with Ago Merico and myself, based at @leibniz-zmt.de in Bremen, Germany. www.leibniz-zmt.de/en/vacancies...

Doctoral candidate (gn) - WG Systems Ecology

Das Leibniz-Zentrum für Marine Tropenforschung (ZMT) erforscht tropische und subtropische Küstenökosysteme und ihre Bedeutung für Natur und Menschen erforscht.

leibniz-zmt.de

Léo Fitouchi@lfitouchi.bsky.social · 4w ago

Why do human societies adopt rigid moral rules? Our new paper, led by @jliep.bsky.social, proposes a new model in PNAS @pnas.org! www.pnas.org/doi/10.1073/...

Why human societies adopt rigid moral rules: The efficiency–robustness trade-off | PNAS

Humans are capable of remarkably flexible moral judgment. Yet societies rely on rigid rules—obligations and prohibitions that apply categorically, ...

pnas.org

Julien Lie-Panis@jliep.bsky.social · 4w ago

Why do societies rely on rigid moral rules? Don't lie. Keep your promises. Don't steal. We all recognize there are good reasons to make exceptions. So why are moral rules so often categorical? Our new paper proposes an answer. 🧵

Screenshot of article title page, "Why human societies adopt rigid moral rules"
Julien Lie-Panis@jliep.bsky.social · 4w ago

Thanks to @dailyneuron.bsky.social for this thoughtful and accessible write-up of our recent paper: dailyneuron.com/rigid-moral-... You can also read our own thread: bsky.app/profile/jlie...

The Rules We Treat as Sacred Are Really Built on Distrust - Daily Neuron

The strictest moral rules ignore context on purpose, and the reason comes down to how easily a good excuse can be faked.

dailyneuron.com

Julien Lie-Panis@jliep.bsky.social · 4w ago

Why do societies rely on rigid moral rules? Don't lie. Keep your promises. Don't steal. We all recognize there are good reasons to make exceptions. So why are moral rules so often categorical? Our new paper proposes an answer. 🧵

Screenshot of article title page, "Why human societies adopt rigid moral rules"
Julien Lie-Panis@jliep.bsky.social · 4w ago

Why do societies rely on rigid moral rules? Don't lie. Keep your promises. Don't steal. We all recognize there are good reasons to make exceptions. So why are moral rules so often categorical? Our new paper proposes an answer. 🧵

Screenshot of article title page, "Why human societies adopt rigid moral rules"
Chadi Saad-Roy@chadisaadroy.bsky.social · 11mo ago

I'm super excited to have joined @ubcmath.bsky.social and @ubcmicroimmuno.bsky.social !! Please get in touch if you might be interested in graduate studies or postdoctoral research opportunities!

UBC Mathematics@ubcmath.bsky.social · 11mo ago

Help us give a warm welcome to Dr. Chadi Saad-Roy, who is joining UBC Mathematics this fall as an Assistant Professor, jointly appointed in the Department of Microbiology and Immunology (‪@ubcmicroimmuno.bsky.social‬). Full details tinyurl.com/4zwdmr8b

Rob Sica@robsica.bsky.social · 3mo ago

"Modern life looks strange not because it escaped our evolutionary past, but because it multiplies the means through which ancient motivations can be expressed. The surface complexity seems culturally specific. The underlying, ultimate logic is not."

Ultimate motivations and the strange things we do every day

Why modern behavior looks evolutionarily strange. And why it isn’t. A framework for reconnecting everyday cultural practices to the ultimate motivations that make them matter.

edgardubourg.substack.com

Saptarshi Pal@saptarshi.bsky.social · 4mo ago

Hey all! Been away from BSky for a while but this Friday I am giving a talk on our latest PNAS Nexus paper on repeated games! We model situations where players, instead of acting simultaneously, act in order. We study the status of well-known equilibrium strategies when simultaneity is broken.

Validate User

academic.oup.com

Simon Columbus@simoncolumbus.bsky.social · 4mo ago

This week's Cooperation Colloquium: Saptarshi Pal (Harvard) From simultaneous to leader-follower play in direct reciprocity Date: April 10 Time: 15:00 UTC+2 (Vienna) / 9am ET (NYC) Sign up here: list.ku.dk/postorius/li...

Abstract: Repeated interaction is a key mechanism driving the evolution of cooperation, generosity, extortion, and other social behaviors. These behaviors are typically studied using two-player repeated games, where the two players act simultaneously in every round. In this paper, we begin with a standard two-action repeated game, but transform it into a leader–follower game. We do this by forcing one player to indicate their impending move, or to openly commit first in each round. We show that this simple transformation provides new and useful analytical insights. In particular, we use this transformation to derive expressions for the main classes of simultaneous-move Nash equilibria of memory-1, when payoffs are discounted. We show that these equilibria also remain stable under the leader–follower structure. We prove that this reassuring property does not always extend to games with more than two actions or to equilibrium strategies with longer memory. Overall, we establish a novel connection between repeated simultaneous-move games and repeated leader–follower games in evolutionary game theory. This approach offers fruitful means of investigating how prediction and anticipation play a role in stable social behavior.