For a complete list, check Google Scholar.
☆: Papers with students I helped to supervised

2024

Causally estimating the effect of YouTube’s recommender system using counterfactual bots

[PNAS] — 📜 Paper | 📄 Pre-print |

Homa Hosseinmardi | Amir Ghasemian | Miguel Rivera-Lanas | Manoel Horta Ribeiro | Robert West | Duncan J Watts |

Media Coverage: New Scientist |

Stranger Danger! Cross-Community Interactions with Fringe Users Increase the Growth of Fringe Communities on Reddit

[ICWSM 2024] — 📜 Paper |

Giuseppe Russo | Manoel Horta Ribeiro | Robert West |

Tube2Vec: Social and Semantic Embeddings of YouTube Channels^☆

[ICWSM 2024] — 📜 Paper | 🔗️ Code |

Léopaul Boesinger | Manoel Horta Ribeiro | Veniamin Veselovsky | Robert West |

2023

Deplatforming did not decrease Parler users’ activity on fringe social media

[PNAS Nexus] — 📜 Paper | 🐦 Twitter Thread | 🔗️ Code |

Manoel Horta Ribeiro | Homa Hosseinmardi | Robert West | Duncan Watts |

The Amplification Paradox in Recommender Systems

[ICWSM 2023] — 📄 Pre-print | 📄 Pre-print | 🐦 Twitter Thread | 🔗️ Code |

Manoel Horta Ribeiro | Veniamin Veselovsky | Robert West |

Automated Content Moderation Increases Adherence to Community Guidelines

[TheWebConf 2023] — 📜 Paper | 📄 Pre-print |

Manoel Horta Ribeiro | Justin Cheng | Robert West |

Quotatives Indicate Decline in Objectivity in US Political News

[ICWSM 2023] — 📜 Paper | 📄 Pre-print | 🐦 Twitter Thread |

Tiancheng Hu | Manoel Horta Ribeiro | Robert West | Andreas Spitz |

Spillover of Antisocial Behavior from Fringe Platforms: The Unintended Consequences of Community Banning

[ICWSM 2023] — 📜 Paper | 📄 Pre-print | 🐦 Twitter Thread |

Giuseppe Russo | Luca Verginer | Manoel Horta Ribeiro | Giona Casiraghi |

Understanding Online Migration Decisions Following the Banning of Radical Communities

[WebSci 2023] — 📜 Paper | 📄 Pre-print | 🐦 Twitter Thread |

Giuseppe Russo | Manoel Horta Ribeiro | Giona Casiraghi | Luca Verginer |

2022

Post approvals in online communities

[ICWSM 2022] — 📜 Paper | 📄 Pre-print | 🐦 Twitter Thread | 📹 Presentation | 📃 Poster | 🌐 Blog post |

Manoel Horta Ribeiro | Justin Cheng | Robert West |

Analyzing the Sleeping Giants Activism Model in Brazil^☆

[WebSci 2022] — 📜 Paper | 📄 Pre-print | 🔗️ Code and data | 🐦 Twitter Thread |

Bárbara Gomes Ribeiro | Manoel Horta Ribeiro | Virgílio Almeida | Wagner Meira Jr |

Media Coverage: Tech Policy Press |

Characterizing Alternative Monetization Strategies on YouTube

[CSCW 2022] — 📜 Paper | 📄 Pre-print | 🔗️ Code | 🐦 Twitter Thread |

Yiqing Hua * | **Manoel Horta Ribeiro * | Thomas Ristenpart | Robert West | Mor Naaman |

Media Coverage: The Verge | FastCompany |

What do fact checkers fact-check when?

[MEDIATE Workshop @ ICWSM] — 📄 Pre-print | 🐦 Twitter Thread | 🔗️ Data and Code |

Manoel Horta Ribeiro |** Savvas Zannettou | Oana Goga | Fabrício Benevenuto | Robert West |

2021

Volunteer contributions to Wikipedia increased during COVID-19 mobility restrictions

[Nature Scientific Reports] — 📜 Paper | 📄 Pre-print | 🔗️ Code | 🐦 Twitter Thread |

Thorsten Ruprechter | Manoel Horta Ribeiro | Tiago Santos | Florian Lemmerich | Markus Strohmaier | Robert West | Denis Helic |

Media Coverage: 🇩🇪 Wikimedia | New Scientist |

Deep neural network-estimated electrocardiographic age as a mortality predictor

[Nature Communications] — 📜 Paper | 🗄️ Data 1 | 🗄️ Data 2 | 🗄️ Data 3 | 🔗️ Code | 🐦 Twitter Thread |

Emilly M. Lima | Antônio H. Ribeiro | Gabriela M. M. Paixão | Manoel Horta Ribeiro | Marcelo M. Pinto-Filho | Paulo R. Gomes | Derick M. Oliveira | Ester C. Sabino | Bruce B. Duncan | Luana Giatti | Sandhi M. Barreto | Wagner Meira Jr | Thomas B. Schön | Antonio Luiz P. Ribeiro |

Media Coverage: 🇧🇷 veja |

Are Anti-Feminist Communities Gateways to the Far Right? Evidence from Reddit and YouTube^☆

[WebSci 2021] — 📜 Paper | 📄 Pre-print | 🔗️ Code | 🗄️️ Data | 📹 Presentation | 🐦 Twitter Post |

Robin Mamié | Manoel Horta Ribeiro | Robert West |

Media Coverage: New Scientist |

YouNiverse: Large-Scale Channel and Video Metadata from English-Speaking YouTube

[ICWSM 2021] — 📜 Paper | 📄 Pre-print | 🔗️ Code | 🗄️ Data | 🌐 Blog post | 📹 Presentation | 🐦 Twitter Post |

Manoel Horta Ribeiro | Robert West |

🏆 Best Paper Honorable Mention Award

Do Platform Migrations Compromise Content Moderation? Evidence from r/The_Donald and r/Incels

[CSCW 2021] — 📜 Paper | 📄 Pre-print | 🔗️ Code and Data | 🌐 Blog post | 📹 Presentation | 🐦 Twitter Post |

Manoel Horta Ribeiro | Shagun Jhaver | Savvas Zannettou | Jeremy Blackburn | Emiliano De Cristofaro | Gianluca Stringhini | Robert West |

Media Coverage: WIRED | The Washington Post | Time | The Conversation | The Brink | NBC News | NBC News | 🇧🇷 Manual do Usuário | 🇪🇸 El País |

Sudden Attention Shifts on Wikipedia During the COVID-19 Crisis

[ICWSM 2021] — 📜 Paper | 📄 Pre-print | 🔗️ Code and Data | 📹 Presentation | 🐦 Twitter Post |

**Manoel Horta Ribeiro * |** Kristina Gligorić * | Maxime Peyrard * | Florian Lemmerich | Markus Strohmaier | Robert West |

The Evolution of the Manosphere Across the Web

[ICWSM 2021] — 📜 Paper | 📄 Pre-print | 🔗️ Code | 🗄️ Data | 📹 Presentation | 🐦 Twitter Thread |

Manoel Horta Ribeiro | Jeremy Blackburn | Barry Bradlyn | Emiliano De Cristofaro | Gianluca Stringhini | Summer Long | Stephanie Greenberg | Savvas Zannettou |

Media Coverage: The Atlantic | 🇧🇷 Folha de São Paulo | 🇪🇸 Newtral | 🇨🇦 La Presse | 🇩🇪 NDR | 🇩🇪 Krautreporter | 🇩🇪 DER SPIEGEL | 🇧🇷 TAB Uol | Newsweek | MIT Tech Review | 🇪🇸 El País | Daily Mail | 🇨🇭Beobachter |

2020

Automatic Diagnosis of the Short-Duration 12-Lead ECG using a Deep Neural Network: the CODE Study

[Nature Communications] — 📜 Paper | 🔗️ Code | 🗄️ Data | 🛹 Models | 🐦 Twitter Thread |

Antônio H Ribeiro | Manoel Horta Ribeiro | Gabriela Paixão | Derick Oliveira | Paulo R Gomes | Jéssica A Canazart | Milton Pifano | Wagner Meira Jr | Thomas B Schön | Antonio Luiz Ribeiro |

Media Coverage: Medical News | 🇸🇪 Forskning |

🏆 89th most influential paper of 2019 according to ALTMETRIC

Auditing Radicalization Pathways on YouTube

[ACM FAT* 2020] — 📜 Paper | 📄 Pre-print | 🌐 Blog post | 📹 Presentation | 🔗️ Code | 🐦 Twitter Thread |

Manoel Horta Ribeiro | Raphael Ottonni | Robert West | Virgílio AF Almeida | Wagner Meira Jr |

Media Coverage: SLPC | New York Times | Tech Crunch | 🇧🇷 piauí | 🇨🇭NZZ | MIT Tech Review | Fox Business | 🇪🇸 El Diario | WIRED | VentureBeat | The Verge | Rolling Stone | 🇧🇷 Nexo Jornal | 🇩🇪 Netzpolitik | NBC News | 🇫🇷 Le Big Data | 🇮🇪 Irish Times | 🇩🇪 Deutschlandfunk | VICE |

2019

Message Distortion in Information Cascades

[TheWebConf 2019] — 📜 Paper | 📄 Pre-print | 🔗️ Code/Data | ▶️ Slides | 🕹️ Demo | 📃 Poster |

Manoel Horta Ribeiro | Kristina Gligoric | Robert West |

Media Coverage: WCSJ2019 |

2018

Characterizing and Detecting Hateful Users on Twitter

[ICWSM 2018] — 📜 Paper | 📄 Pre-print (extended) | 🔗️ Code | 🗄 Data | ▶️ Slides | 📃 Poster |

Manoel Horta Ribeiro | Pedro H Calais | Yuri A Santos | Virgílio AF Almeida | Wagner Meira Jr |

Pre-prints

Generating Faithful Synthetic Data with Large Language Models: A Case Study in Computational Social Science^☆

[preprint] — 📜 Paper |

Veniamin Veselovsky | Manoel Horta Ribeiro | Akhil Arora | Martin Josifoski | Ashton Anderson | Robert West |

Can Language Models Recognize Convincing Arguments?^☆

[preprint] — 📄 Pre-print |

Paula Rescala | Manoel Horta Ribeiro | Tiancheng Hu | Robert West |

On the Conversational Persuasiveness of Large Language Models: A Randomized Controlled Trial^☆

[preprint] — 📄 Pre-print |

Francesco Salvi | Manoel Horta Ribeiro | Riccardo Gallotti | Robert West |

Media Coverage: New Scientist |

Deplatforming Norm-Violating Influencers on Social Media Reduces Overall Online Attention Toward Them^☆

[preprint] — 📄 Pre-print |

Manoel Horta Ribeiro | Shagun Jhaver | Jordi Cluet i Martinell | Marie Reignier-Tayar | Robert West |

Prevalence and prevention of large language model use in crowd work^☆

[preprint] — 📄 Pre-print |

Veniamin Veselovsky* | Manoel Horta Ribeiro* | Philip Cozzolino | Andrew Gordon | David Rothschild | Robert West |

Protection from Evil and Good: The Differential Effects of Page Protection on Wikipedia Article Quality

[preprint] — 📄 Pre-print |

Thorsten Ruprechter | Manoel Horta Ribeiro | Robert West | Denis Helic |

Artificial Artificial Artificial Intelligence: Crowd Workers Widely Use Large Language Models for Text Production Tasks^☆

[preprint] — 📜 Paper | 🐦 Twitter Thread | 🔗️ Code |

Veniamin Veselovsky* | Manoel Horta Ribeiro* | Robert West |

Media Coverage: The Register | Tech Crunch | Tech Crunch | Tech Crunch | Platformer | mint | 🇮🇹 Linkiesta | Import AI | Futurism | 🇫🇷 Frandroid | Tech Crunch | 🇫🇷 Courrier International | Bloomberg | 🇪🇬 Al-Masry Al-Youm | Technology Review |