Reposted by Natalie CollinaAaron Roth @aaroth.bsky.social · 15/09/2026Codex and Claude Code have a neat auto approve feature where 1) it doesn't ask for permissions, but 2) you get to feel safe. Well --- do you? The premise is it is asking an agent for permission. But if you don't trust the driver agent, why should you trust the review agent? 2255
Reposted by Natalie CollinaAaron Roth @aaroth.bsky.social · 03/07/2026On Monday @ncollina.bsky.social @iraglobusharris.bsky.social and I are giving a tutorial at ICML on (multi)calibration and its applications. You can find slides and an annotated bibliography on the website: calibration-tutorial.github.io as well as an interactive demo of online calibration algs.calibration-tutorial.github.ioCalibration, Decisions, and Collaboration in Learning | ICML 2026An ICML 2026 tutorial on making probabilistic predictions trustworthy for downstream decision-making and collaboration. 133711
Reposted by Natalie CollinaIra Globus-Harris @iraglobusharris.bsky.social · 03/07/2026Are you at ICML next week? Feel like your decision-making for which sessions to attend might not be risk minimizing? Don't incur (swap) regret and come to my, @aaroth.bsky.social, and @ncollina.bsky.social's tutorial Monday on multicalibration, decision-making, and collaborative learning! 22011
Natalie Collina @ncollina.bsky.social · 09/04/2026Excited to give a tutorial this year at ICML 2026! 1155
Reposted by Natalie CollinaSilvia Sellán @silviasellan.bsky.social · 05/02/2026If someone refers an undergraduate student to a known sex offender for a job, and includes a comment about how good-looking the student is in their recommendation letter, that someone should never be allowed to teach undergraduate students ever again. 2121
Reposted by Natalie CollinaMoira Donegan @moiradonegan.bsky.social · 23/02/2026Why do I have to pretend that I'm going to print something in order to save it as a PDF. Why do I have to engage in a little ruse. 334191442875
Reposted by Natalie CollinaClément Canonne @ccanonne.github.io · 21/02/2026Heard joke once: Man goes to doctor. Says he's depressed. Says life seems harsh and cruel. Says he feels all alone in a threatening world where what lies ahead is vague and uncertain. Doctor says, "Sorry: you have exceeded your token usage. Please try again later or switch to Auto" 36715
Reposted by Natalie CollinaMinnesota Star Tribune @startribune.com · 23/01/2026Tomorrow's front page of the Minnesota Star Tribune: Jan. 24, 2026 146100173922
Reposted by Natalie CollinaAaron Roth @aaroth.bsky.social · 09/01/2026Excited about a new paper! Multicalibration turns out to be strictly harder than marginal calibration. We prove tight Omega(T^{2/3}) lower bounds for online multicalibration, separating it from online marginal calibration for which better rates were recently discovered. 1225
Reposted by Natalie CollinaKat Abughazaleh @katmabu.bsky.social · 08/01/2026You and your wife drop your 6-year-old off at school. You just moved here. You see ICE terrorizing your new neighbors. You film them, as is your legal right. Your wife complies with orders. She is then shot in the head. You still have to pick up your child later today. This could be you. 10634383216962
Reposted by Natalie CollinaNeugin @lostcitymagic.bsky.social · 01/01/2026A message for you all to carry through the year 199814022
Reposted by Natalie CollinaTommy Siegel @tommysiegel.bsky.social · 25/11/2025I just think it would be neat if turkeys used the same technique to draw us 6790236
Reposted by Natalie CollinaTCS+ @tcsplus.bsky.social · 25/11/2025📢 Our last TCS+ talk of the season will be Wed, Dec 3 (10am PT, 1pm ET, 19:00 CET): Natalie Collina (@ncollina.bsky.social), from UPenn, will tell us about "Swap regret and correlated equilibria beyond normal-form games"! RSVP to receive the link (one day before the talk): forms.gle/utLgSxLpqvpx...forms.gleTCS+ RSVP: Natalie Collina (2025/12/03)Title: Swap regret and correlated equilibria beyond normal-form games 0128
Reposted by Natalie CollinaJess Calarco @jessicacalarco.com · 01/11/2025We have progressed from data collection to data analysis. 971344744087
Reposted by Natalie CollinaNathan Yau @flowingdata.com · 31/10/2025Halloween logicals, still the best 10/31 venn 123073
Reposted by Natalie CollinaThe English Oak Project @thekentacorn.bsky.social · 24/10/2025Nature’s Gold, England’s Glory 428836
Natalie Collina @ncollina.bsky.social · 22/10/2025And now might be a good time to mention, I’m on the faculty job market this year! I do work in human-AI collusion, collaboration and competition, with an eye towards building foundations for trustworthy AI. Check out more info on my website here! Nataliecollina.comnataliecollina.comNatalie Collina 13113
Natalie Collina @ncollina.bsky.social · 22/10/2025Our paper on algorithmic collusion was featured in a Quanta article! www.quantamagazine.org/the-game-the...quantamagazine.orgThe Game Theory of How Algorithms Can Drive Up Prices | Quanta MagazineRecent findings reveal that even simple pricing algorithms can make things more expensive. 2309
Natalie Collina @ncollina.bsky.social · 04/10/2025Appearing in SODA 2026! Last year we had a 3-page SODA paper, this one is 107 pages. Next time I’m thinking we swing way back the other way and just submit a twitter/bluesky thread 0232
Reposted by Natalie CollinaAaron Roth @aaroth.bsky.social · 19/09/2025Aligning an AI with human preferences might be hard. But there is more than one AI out there, and users can choose which to use. Can we get the benefits of a fully aligned AI without solving the alignment problem? In a new paper we study a setting in which the answer is yes. 1274
Reposted by Natalie CollinaEugene Vinitsky 🍒 @eugenevinitsky.bsky.social · 09/07/2025Thing with Grok is that better versions will be less overt and more convincing. An expert on arguing about the deficit, immigration, public health, etc. with a particular political slant 211210
Natalie Collina @ncollina.bsky.social · 06/07/2025As AI systems continue to become more complex and hard to reason about, one increasingly powerful lens through which to understand them is through the incentives of AI creators. 160
Reposted by Natalie CollinaEshwar Ram Arunachaleswaran @epsilonrational.bsky.social · 04/07/2025Ecstatic and deeply honored by this award. I've had great fun thinking about algorithms as strategies for repeated games over the past few years and hope that this highlight will push more researchers to come up with exciting directions in this field! Come to our talk on Monday to learn more! 2143
Natalie Collina @ncollina.bsky.social · 03/07/2025This best paper news is a good opportunity to highlight that a month or so ago I started maintaining CV of failures on my website. It will almost certainly continue to grow linearly in the number of things I attempt to do, and that’s a good thing! www.seas.upenn.edu/~ncollina/Fa...seas.upenn.edu 0141
Natalie Collina @ncollina.bsky.social · 03/07/2025Delighted (and honestly a little bit stunned) that our paper “Swap Regret and Correlated Equilibria Beyond Normal-Form Games” was just awarded both the “Best Paper” and “Best Student Paper” at EC! arxiv.org/abs/2502.20229arxiv.orgSwap Regret and Correlated Equilibria Beyond Normal-Form GamesSwap regret is a notion that has proven itself to be central to the study of general-sum normal-form games, with swap-regret minimization leading to convergence to the set of correlated equilibria and... 3635
Reposted by Natalie CollinaProfKFH @profkfh.bsky.social · 19/06/2025Harriet Tubman #quilt by my Mom, Vera P. Hall, who makes quilts celebrating Black people who fought for their own freedom. This seems to be the crowd favorite of the “We Didn’t Wait for Freedom” series. Happy #Juneteenth #quilting 1517315746167
Reposted by Natalie CollinaNews Eye @newseye.bsky.social · 14/06/2025NEW: Democracy is alive in Philly! Amazing scenes in Philadelphia as thousands hit the streets for the anti-Trump protest. #NoKings #50501Movement 159136993110
Natalie Collina @ncollina.bsky.social · 10/06/2025I hugely recommend Harry as a researcher, mentor and person. If you are interested in the stuff he does, apply to do a PhD with him! 030
Reposted by Natalie CollinaAaron Roth @aaroth.bsky.social · 17/05/2025Check out the terrific set of EC 2025 accepted papers! ec25.sigecom.org/program/acce...ec25.sigecom.orgEC 2025 Accepted Papers - EC 20251. Optimality of Non-Adaptive Algorithms in Online Submodular Welfare Maximization with Stochastic Outcomes Authors: Rajan Udwani (University of California, Berkeley) 2. Investment and misallocation i... 02211
Reposted by Natalie CollinaMatthew Green @matthewdgreen.bsky.social · 03/05/2025The idea that you can just “teach computer science” and be apolitical is a beautiful dream that expired in the 2000s, at the latest. Computer science has re-organized every facet of our society: it is inherently political. Instead of taking this idea seriously, we ran from it. Now we live in hell. 523659
Reposted by Natalie CollinaRandall Munroe @xkcd.com · 25/04/2025PhD Timeline xkcd.com/3081 5865978920441
Reposted by Natalie CollinaVincent Conitzer @conitzer.bsky.social · 03/05/2025I'm an AI researcher. The proposed devastating cuts to US science are supposed to spare AI. That's like a football team saying we're going to slash spending on everything but the quarterback. That quarterback will not be successful (or will go play for another team). www.nature.com/articles/d41...nature.comTrump proposes unprecedented budget cuts to US scienceHuge reductions, if enacted, could have ‘catastrophic’ effects on US competitiveness and the scientific pipeline, critics say. 0131
Natalie Collina @ncollina.bsky.social · 15/04/2025So proud of my sibling, who is doing amazing work in the Philly community. A reminder to all of us who are overwhelmed with the state of the world right now—sometimes positive impact starts with the community directly around you. www.linkedin.com/posts/temple...linkedin.comLu Collina saw a need in the community and did what they could to help… | Temple University Department of Social & Behavioral SciencesLu Collina saw a need in the community and did what they could to help. That is one reason they were nominated by two faculty members for the Outstanding BSPH Senior Award. When Lu arrived on campus, ... 050
Reposted by Natalie CollinaJacob Bogage @jacobbogage.bsky.social · 12/04/2025🚨 WaPo exclusive — The Trump admin has set its sights on deporting **1 MILLION** immigrants this year. How it went from a quiet ambition to a White House strategy. Scooping with @mariasacchetti.bsky.social.washingtonpost.com‘One million.’ The private goal driving Trump’s push for mass deportations.Immigration officers and analysts are increasingly skeptical the Trump administration can deport that many immigrants in a single year. 44274150
Reposted by Natalie CollinaEric C. Greene @dnacurtain.bsky.social · 11/04/2025I am a professor at Columbia University. All of the student NIH training grants have been canceled and now there are reports that ALL funding will be frozen. Why are Universities not banding together and speaking out publicly and forcibly about governmental attacks on biomedical research? 521305406
Reposted by Natalie CollinaThe New York Times @nytimes.com · 11/04/2025Kseniia Petrova, a Harvard scientist who fled Russia after protesting its invasion of Ukraine, has been captive to the hard-line immigration policies of the Trump administration for nearly eight weeks. She fears arrest if she is deported.nytimes.comShe Worked in a Harvard Lab to Reverse Aging, Until ICE Jailed HerPresident Trump’s immigration crackdown ensnared Kseniia Petrova, a scientist who fled Russia after protesting its invasion of Ukraine. She fears arrest if she is deported there. 35733299
Natalie Collina @ncollina.bsky.social · 09/04/2025Check out our new paper on collaborative prediction! 0111
Natalie Collina @ncollina.bsky.social · 24/03/2025I’m in Munich this week for CSLAW, presenting our work on the difficulty of defining and regulating algorithmic collusion! arxiv.org/abs/2409.03956 If you’re in the area and want to chat about coordination between algorithms (or anything else related to the game theory/ML intersection) let me know!arxiv.orgAlgorithmic Collusion Without ThreatsThere has been substantial recent concern that pricing algorithms might learn to ``collude.'' Supra-competitive prices can emerge as a Nash equilibrium of repeated pricing games, in which sellers play... 070
Reposted by Natalie CollinaKira Goldner @kiragoldner.bsky.social · 09/03/2025Whoa, was half-listening to a @thedailyshow.com segment with @linamkhan.bsky.social and suddenly heard talk of Algorithmic Collusion! (11 min in) Way to go, people researching this! @jasonhartline.bsky.social @aaroth.bsky.social @jubaz.bsky.social @ncollina.bsky.social @yannaigonch.bsky.socialyoutu.beLina Khan – FTC Chair on Amazon Antitrust Lawsuit & AI Oversight | The Daily ShowYouTube video by The Daily Show 2112
Natalie Collina @ncollina.bsky.social · 01/03/2025Excited about our new work, asking what should count as “swap regret” in Bayesian games and beyond! We think we’ve pinned down a really nice answer, as @epsilonrational.bsky.social describes in this thread: 0140
Reposted by Natalie CollinaElliot Lipnowski @elliotlip.bsky.social · 18/02/2025Good rule of thumb in life: David Blackwell already figured this out 1221
Reposted by Natalie CollinaZahra Fakhraai @zahrafakhraai.bsky.social · 15/02/2025I wish the faculty/students were given a chance to decide on this. Do we want to stand up for our students and first amendment rights or care more about money at the expense of what someone phrased as "only a minority concern". 15711
Natalie Collina @ncollina.bsky.social · 15/02/2025And speaking of good news, this paper was accepted to STOC’25! It’s my first STOC/FOCS paper, which, as someone who likes to think of herself as a theorist, is an exciting milestone! 2411
Natalie Collina @ncollina.bsky.social · 15/02/2025Shout out to @aaroth.bsky.social for helping make this possible! He has been a fantastic advisor, giving me the freedom to do whatever research I want while also providing guidance towards very cool lines of thought. 1130
Natalie Collina @ncollina.bsky.social · 09/02/2025Go, and I say this with the utmost sincerity, Birds 170
Reposted by Natalie CollinaLex McMenamin (they/them) @lexmcmenamin.com · 04/02/2025seen in Philadelphia: FUCK ICE FUCK TRUMP + MUSK GO BIRDS 181012272
Reposted by Natalie CollinaDr. Wendy Bohon @drwendyrocks.bsky.social · 05/02/2025NASA did a feature on me last year. It was up this weekend but now when you click on the link you get a 404 message. 11732491795
Reposted by Natalie CollinaErwan Rivault @erwanrivault.com · 10/01/2025NEW: 2024 has just been confirmed as the warmest year on record, and the first to breach the 1.5C threshold. We used a ridgeline (Joy Division inspired) chart to visualise daily temperature anomalies since 1940. 2024 clearly stands out with 100% of its days above 1.3C and 75% above 1.5C. 20958802764