2021

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Population-Scale Study of Human Needs During the COVID-19 Pandemic: Analysis and Implications
Jina Suh | Eric Horvitz | Ryen W. White | Tim Althoff
WSDM '21, The Fourteenth ACM International Conference on Web Search and Data Mining, Virtual Event, Israel, March 8-12, 2021

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Online Mobile App Usage as an Indicator of Sleep Behavior and Job Performance
Chunjong Park | Morelle Arian | Xin Liu | Leon Sasson | Jeffrey Kahn | Shwetak N. Patel | Alex Mariakakis | Tim Althoff
WWW '21: The Web Conference 2021, Virtual Event / Ljubljana, Slovenia, April 19-23, 2021

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Towards Facilitating Empathic Conversations in Online Mental Health Support: A Reinforcement Learning Approach
Ashish Sharma | Inna W. Lin | Adam S. Miner | David C. Atkins | Tim Althoff
WWW '21: The Web Conference 2021, Virtual Event / Ljubljana, Slovenia, April 19-23, 2021

2019

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Goal-setting And Achievement In Activity Tracking Apps: A Case Study Of MyFitnessPal
Mitchell L. Gordon | Tim Althoff | Jure Leskovec
The World Wide Web Conference, WWW 2019, San Francisco, CA, USA, May 13-17, 2019

2018

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I'll Be Back: On the Multiple Lives of Users of a Mobile Activity Tracking Application
Zhiyuan Lin | Tim Althoff | Jure Leskovec
Proceedings of the 2018 World Wide Web Conference on World Wide Web, WWW 2018, Lyon, France, April 23-27, 2018

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Modeling Interdependent and Periodic Real-World Action Sequences
Takeshi Kurashima | Tim Althoff | Jure Leskovec
Proceedings of the 2018 World Wide Web Conference on World Wide Web, WWW 2018, Lyon, France, April 23-27, 2018

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Modeling Individual Cyclic Variation in Human Behavior
Emma Pierson | Tim Althoff | Jure Leskovec
Proceedings of the 2018 World Wide Web Conference on World Wide Web, WWW 2018, Lyon, France, April 23-27, 2018

2017

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Online Actions with Offline Impact: How Online Social Networks Influence Online and Offline User Behavior
Tim Althoff | Pranav Jindal | Jure Leskovec
Proceedings of the Tenth ACM International Conference on Web Search and Data Mining, WSDM 2017, Cambridge, United Kingdom, February 6-10, 2017

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Harnessing the Web for Population-Scale Physiological Sensing: A Case Study of Sleep and Performance
Tim Althoff | Eric Horvitz | Ryen W. White | Jamie M. Zeitzer
Proceedings of the 26th International Conference on World Wide Web, WWW 2017, Perth, Australia, April 3-7, 2017

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How Gamification Affects Physical Activity: Large-scale Analysis of Walking Challenges in a Mobile Application
Ali Shameli | Tim Althoff | Amin Saberi | Jure Leskovec
Proceedings of the 26th International Conference on World Wide Web Companion, Perth, Australia, April 3-7, 2017

2015

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Donor Retention in Online Crowdfunding Communities: A Case Study of DonorsChoose.org
Tim Althoff | Jure Leskovec
Proceedings of the 24th International Conference on World Wide Web, WWW 2015, Florence, Italy, May 18-22, 2015