Marian-Andrei Rizoiu

2026

DREAMS: A Social Exchange Theory-Informed Modeling of Misinformation Engagement on Social Media.

Lin Tian|Marian-Andrei Rizoiu

Proceedings of the ACM Web Conference 2026, WWW 2026, Dubai, United Arab Emirates, originally scheduled for April 13-17, 2026, rescheduled for June 29 - July 3, 2026.

2025

X-Troll: eXplainable Detection of State-Sponsored Information Operations Agents.

Lin Tian|Xiuzhen Zhang|Maria Myung-Hee Kim|Jennifer Biggs|Marian-Andrei Rizoiu

Proceedings of the 34th ACM International Conference on Information and Knowledge Management, CIKM 2025, Seoul, Republic of Korea, November 10-14, 2025

Mario at EXIST 2025: A Simple Gateway to Effective Multilingual Sexism Detection.

Lin Tian|Johanne R. Trippas|Marian-Andrei Rizoiu

Working Notes of the Conference and Labs of the Evaluation Forum, CLEF 2025, Madrid, Spain, 9-12 September 2025.

Before It's Too Late: A State Space Model for the Early Prediction of Misinformation and Disinformation Engagement.

Lin Tian|Emily Booth|Francesco Bailo|Julian Droogan|Marian-Andrei Rizoiu

Proceedings of the ACM on Web Conference 2025, WWW 2025, Sydney, NSW, Australia, 28 April 2025- 2 May 2025

Behavioral Homophily in Social Media via Inverse Reinforcement Learning: A Reddit Case Study.

Lanqin Yuan|Philipp J. Schneider|Marian-Andrei Rizoiu|Frank Loebe|Marian-Andrei Rizoiu|Frank Loebe

Proceedings of the ACM on Web Conference 2025, WWW 2025, Sydney, NSW, Australia, 28 April 2025- 2 May 2025

2023

Enhancing Biomedical Text Summarization and Question-Answering: On the Utility of Domain-Specific Pre-Training.

Dima Galat|Marian-Andrei Rizoiu

Working Notes of the Conference and Labs of the Evaluation Forum (CLEF 2023), Thessaloniki, Greece, September 18th to 21st, 2023.

Interval-censored Transformer Hawkes: Detecting Information Operations using the Reaction of Social Systems.

Quyu Kong|Pio Calderon|Rohit Ram|Olga Boichak|Marian-Andrei Rizoiu

Proceedings of the ACM Web Conference 2023, WWW 2023, Austin, TX, USA, 30 April 2023 - 4 May 2023

2021

Evently: Modeling and Analyzing Reshare Cascades with Hawkes Processes.

Quyu Kong|Rohit Ram|Marian-Andrei Rizoiu

WSDM '21, The Fourteenth ACM International Conference on Web Search and Data Mining, Virtual Event, Israel, March 8-12, 2021

Birdspotter: A Tool for Analyzing and Labeling Twitter Users.

Rohit Ram|Quyu Kong|Marian-Andrei Rizoiu

WSDM '21, The Fourteenth ACM International Conference on Web Search and Data Mining, Virtual Event, Israel, March 8-12, 2021

2020

Describing and Predicting Online Items with Reshare Cascades via Dual Mixture Self-exciting Processes.

Quyu Kong|Marian-Andrei Rizoiu|Lexing Xie

CIKM '20: The 29th ACM International Conference on Information and Knowledge Management, Virtual Event, Ireland, October 19-23, 2020

Modeling Information Cascades with Self-exciting Processes via Generalized Epidemic Models.

Quyu Kong|Marian-Andrei Rizoiu|Lexing Xie

WSDM '20: The Thirteenth ACM International Conference on Web Search and Data Mining, Houston, TX, USA, February 3-7, 2020

2018

SIR-Hawkes: Linking Epidemic Models and Hawkes Processes to Model Diffusions in Finite Populations.

Marian-Andrei Rizoiu|Swapnil Mishra|Quyu Kong|Mark James Carman|Lexing Xie

Proceedings of the 2018 World Wide Web Conference on World Wide Web, WWW 2018, Lyon, France, April 23-27, 2018

Will This Video Go Viral: Explaining and Predicting the Popularity of Youtube Videos.

Quyu Kong|Marian-Andrei Rizoiu|Siqi Wu|Lexing Xie

Companion Proceedings of the The Web Conference 2018, WWW 2018, Lyon , France, April 23-27, 2018

2017

Expecting to be HIP: Hawkes Intensity Processes for Social Media Popularity.

Marian-Andrei Rizoiu|Lexing Xie|Scott Sanner|Manuel Cebrián|Honglin Yu|Pascal Van Hentenryck

Proceedings of the 26th International Conference on World Wide Web, WWW 2017, Perth, Australia, April 3-7, 2017

2016

Feature Driven and Point Process Approaches for Popularity Prediction.

Swapnil Mishra|Marian-Andrei Rizoiu|Lexing Xie

Proceedings of the 25th ACM International Conference on Information and Knowledge Management, CIKM 2016, Indianapolis, IN, USA, October 24-28, 2016

Evolution of Privacy Loss in Wikipedia.

Marian-Andrei Rizoiu|Lexing Xie|Tibério S. Caetano|Manuel Cebrián

Proceedings of the Ninth ACM International Conference on Web Search and Data Mining, San Francisco, CA, USA, February 22-25, 2016

2015

Temporal Multinomial Mixture for Instance-Oriented Evolutionary Clustering.

Young-Min Kim|Julien Velcin|Stéphane Bonnevay|Marian-Andrei Rizoiu

Advances in Information Retrieval - 37th European Conference on IR Research, ECIR 2015, Vienna, Austria, March 29 - April 2, 2015. Proceedings