Assistant Professor @ Princeton Previously: EPFL 🇨🇭, UFMG 🇧🇷 Interests: Computational Social Science, Platforms, GenAI, Moderation https://bsky.app/profile/manoelhortaribeiro.bsky.socialhttps://bsky.app/profile/manoelhortaribeiro.bsky.social/post/3mlgvonwj5227My new post discusses the probable future of AI-assisted shopping! Drawing on our recent paper, I argue that if LLMs become the interface through which we search, compare, and buy things, we need a much sharper line between advertising and advice! https://doomscrollingbabel.manoel.xyz/p/when-the-ai-assistant-becomes-the09 May 2026 18:45 +0000at://did:plc:ldc2wu7h57ks63hpjmosislw/app.bsky.feed.post/3mlgvonwj5227https://bsky.app/profile/manoelhortaribeiro.bsky.social/post/3mjrl3jfpcc2oIn a post-CHI blog post, I talk about what I believe technology like the Anthropic Interviewer will mean for qualitative research. https://doomscrollingbabel.manoel.xyz/p/qualitative-research-after-the-interviewer18 Apr 2026 13:44 +0000at://did:plc:ldc2wu7h57ks63hpjmosislw/app.bsky.feed.post/3mjrl3jfpcc2ohttps://bsky.app/profile/manoelhortaribeiro.bsky.social/post/3mjjfndowrk2yCome check bonsai out Thursday at P114!!! 9am session 😴😪🎉 [contains quote post or other embedded content]15 Apr 2026 07:45 +0000at://did:plc:ldc2wu7h57ks63hpjmosislw/app.bsky.feed.post/3mjjfndowrk2yhttps://bsky.app/profile/manoelhortaribeiro.bsky.social/post/3mjdhuahmns2xI'm flying to Barcelona to attend @chi.acm.org! Let's hang out! :-)12 Apr 2026 23:09 +0000at://did:plc:ldc2wu7h57ks63hpjmosislw/app.bsky.feed.post/3mjdhuahmns2xhttps://bsky.app/profile/manoelhortaribeiro.bsky.social/post/3miw23lx6o223LLMs will transform e-commerce in ways that consumer protection is unprepared for! Our new preprint finds that conversational AI can strongly steer consumer choices: sponsored product selection nearly tripled relative to traditional placement (N=2012). Link: arxiv.org/abs/2604.0426307 Apr 2026 14:58 +0000at://did:plc:ldc2wu7h57ks63hpjmosislw/app.bsky.feed.post/3miw23lx6o223https://bsky.app/profile/manoelhortaribeiro.bsky.social/post/3mhigjwb77c2d [contains quote post or other embedded content]20 Mar 2026 11:38 +0000at://did:plc:ldc2wu7h57ks63hpjmosislw/app.bsky.feed.post/3mhigjwb77c2dhttps://bsky.app/profile/manoelhortaribeiro.bsky.social/post/3mfrogo72fs26Thought-provoking thread by @mjcrockett.bsky.social Some additional thoughts: maybe the reason why math is where LLMs seem to be making most progress is that that's where verification is cheaper and more definitive (tuhs, sources matter less)? E.g., 17-year-olds proving conjectures... [contains quote post or other embedded content]26 Feb 2026 17:03 +0000at://did:plc:ldc2wu7h57ks63hpjmosislw/app.bsky.feed.post/3mfrogo72fs26https://bsky.app/profile/manoelhortaribeiro.bsky.social/post/3mf6kenbxvc27This is such a banger [contains quote post or other embedded content]19 Feb 2026 02:30 +0000at://did:plc:ldc2wu7h57ks63hpjmosislw/app.bsky.feed.post/3mf6kenbxvc27https://bsky.app/profile/manoelhortaribeiro.bsky.social/post/3meyccovym22sI wrote about Brandon Sanderson’s take on AI art. It is one of the most thoughtful and intellectually humble pieces I've seen on the subject. TL;DR: I agree with the spirit, but not the conclusion. https://doomscrollingbabel.manoel.xyz/p/brandon-sandersons-case-against-ai16 Feb 2026 14:49 +0000at://did:plc:ldc2wu7h57ks63hpjmosislw/app.bsky.feed.post/3meyccovym22shttps://bsky.app/profile/manoelhortaribeiro.bsky.social/post/3me2mmefmgc2oDeepfake pornography isn’t going away just because we are passing laws and taking down a couple of big websites. Our new pre-print, led by @aedcv.bsky.social suggests that the sharing of this material continued to prosper even after platform and policy shocks. arxiv.org/abs/2602.0275404 Feb 2026 19:34 +0000at://did:plc:ldc2wu7h57ks63hpjmosislw/app.bsky.feed.post/3me2mmefmgc2ohttps://bsky.app/profile/manoelhortaribeiro.bsky.social/post/3mcwnyup36k2aFolks who have papers with emojis / images in the title! How do you make the pdf metadata title pretty?21 Jan 2026 12:23 +0000at://did:plc:ldc2wu7h57ks63hpjmosislw/app.bsky.feed.post/3mcwnyup36k2ahttps://bsky.app/profile/manoelhortaribeiro.bsky.social/post/3mcuj5gdrmk2hIn June 2024, X made its likes private. You can still like, authors can still see—but everyone else can’t. So… does hiding likes change what people are willing to endorse? Our new paper led by @yuweichuai.bsky.social: not very much! arxiv.org/abs/2601.1114020 Jan 2026 15:51 +0000at://did:plc:ldc2wu7h57ks63hpjmosislw/app.bsky.feed.post/3mcuj5gdrmk2hhttps://bsky.app/profile/manoelhortaribeiro.bsky.social/post/3mc6mlwrgik2kThis new paper is very cool. But takeaway isn't "LLMs constantly leak books.' It’s "with the right (adversarial) procedure, you can extract memorized text." Prevalence in the wild is a separate question!! arxiv.org/abs/2601.02671 https://arxiv.org/abs/2601.0267111 Jan 2026 22:54 +0000at://did:plc:ldc2wu7h57ks63hpjmosislw/app.bsky.feed.post/3mc6mlwrgik2khttps://bsky.app/profile/manoelhortaribeiro.bsky.social/post/3mbp6vhloc22pDo reasoning models have real “Aha!” moments—mid-chain realizations where they intrinsically self-correct? In a new pre-print, “The Illusion of Insight in Reasoning Models," led by @liv-daliberti.bsky.social we provide strong evidence that they do not! 📜: arxiv.org/abs/2601.0051405 Jan 2026 19:39 +0000at://did:plc:ldc2wu7h57ks63hpjmosislw/app.bsky.feed.post/3mbp6vhloc22p