Piotr Sapiezynski

According to our database, Piotr Sapiezynski authored at least 30 papers between 2013 and 2024.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2024

Comprehensively Auditing the TikTok Mobile App.

Levi Kaplan, Piotr Sapiezynski

Proceedings of the Companion Proceedings of the ACM on Web Conference 2024, 2024

Fairness in Online Ad Delivery.

Joachim Baumann, Piotr Sapiezynski, Christoph Heitz, Aniko Hannak

Proceedings of the 2024 ACM Conference on Fairness, Accountability, and Transparency, 2024

2023

Detrimental network effects in privacy: A graph-theoretic model for node-based intrusions.

Florimond Houssiau, Piotr Sapiezynski, Laura Radaelli, Erez Shmueli, Yves-Alexandre de Montjoye

Patterns, January, 2023

Problematic Advertising and its Disparate Exposure on Facebook.

Muhammad Ali, Angelica Goetzen, Alan Mislove, Elissa M. Redmiles, Piotr Sapiezynski

Proceedings of the 32nd USENIX Security Symposium, 2023

2022

Measurement and analysis of implied identity in ad delivery optimization.

Levi Kaplan, Nicole Gerzon, Alan Mislove, Piotr Sapiezynski

Proceedings of the 22nd ACM Internet Measurement Conference, 2022

Algorithms that "Don't See Color": Measuring Biases in Lookalike and Special Ad Audiences.

Piotr Sapiezynski, Avijit Ghosh, Levi Kaplan, Aaron Rieke, Alan Mislove

Proceedings of the AIES '22: AAAI/ACM Conference on AI, Ethics, and Society, Oxford, United Kingdom, May 19, 2022

2021

Ad Delivery Algorithms: The Hidden Arbiters of Political Messaging.

Muhammad Ali, Piotr Sapiezynski, Aleksandra Korolova, Alan Mislove, Aaron Rieke

Proceedings of the WSDM '21, 2021

2020

Evolution of Digital Advertising Strategies during the 2020 US Presidential Primary.

NaLette Brodnax, Piotr Sapiezynski

CoRR, 2020

The Fallibility of Contact-Tracing Apps.

Piotr Sapiezynski, Johanna Pruessing, Vedran Sekara

CoRR, 2020

2019

Investigating sources of PII used in Facebook's targeted advertising.

Giridhari Venkatadri, Elena Lucherini, Piotr Sapiezynski, Alan Mislove

Proc. Priv. Enhancing Technol., 2019

Discrimination through Optimization: How Facebook's Ad Delivery Can Lead to Biased Outcomes.

Muhammad Ali, Piotr Sapiezynski, Miranda Bogen, Aleksandra Korolova, Alan Mislove, Aaron Rieke

Proc. ACM Hum. Comput. Interact., 2019

Algorithms that "Don't See Color": Comparing Biases in Lookalike and Special Ad Audiences.

Piotr Sapiezynski, Avijit Ghosh, Levi Kaplan, Alan Mislove, Aaron Rieke

CoRR, 2019

Discrimination through optimization: How Facebook's ad delivery can lead to skewed outcomes.

Muhammad Ali, Piotr Sapiezynski, Miranda Bogen, Aleksandra Korolova, Alan Mislove, Aaron Rieke

CoRR, 2019

Quantifying the Impact of User Attention on Fair Group Representation in Ranked Lists.

Piotr Sapiezynski, Wesley Zeng, Ronald E. Robertson, Alan Mislove, Christo Wilson

CoRR, 2019

Auditing Offline Data Brokers via Facebook's Advertising Platform.

Giridhari Venkatadri, Piotr Sapiezynski, Elissa M. Redmiles, Alan Mislove, Oana Goga, Michelle L. Mazurek, Krishna P. Gummadi

Proceedings of the World Wide Web Conference, 2019

Quantifying the Impact of User Attentionon Fair Group Representation in Ranked Lists.

Piotr Sapiezynski, Wesley Zeng, Ronald E. Robertson, Alan Mislove, Christo Wilson

Proceedings of the Companion of The 2019 World Wide Web Conference, 2019

2018

Academic performance and behavioral patterns.

Valentin Kassarnig, Enys Mones, Andreas Bjerre-Nielsen, Piotr Sapiezynski, David Dreyer Lassen, Sune Lehmann

EPJ Data Sci., 2018

Offline Behaviors of Online Friends.

Piotr Sapiezynski, Arkadiusz Stopczynski, David Kofoed Wind, Jure Leskovec, Sune Lehmann

CoRR, 2018

Quantifying Surveillance in the Networked Age: Node-based Intrusions and Group Privacy.

Laura Radaelli, Piotr Sapiezynski, Florimond Houssiau, Erez Shmueli, Yves-Alexandre de Montjoye

CoRR, 2018

2017

Inferring Person-to-person Proximity Using WiFi Signals.

Piotr Sapiezynski, Arkadiusz Stopczynski, David Kofoed Wind, Jure Leskovec, Sune Lehmann

Proc. ACM Interact. Mob. Wearable Ubiquitous Technol., 2017

The Role of Gender in Social Network Organization.

Ioanna Psylla, Piotr Sapiezynski, Enys Mones, Sune Lehmann

CoRR, 2017

Evidence of Complex Contagion of Information in Social Media: An Experiment Using Twitter Bots.

Bjarke Mønsted, Piotr Sapiezynski, Emilio Ferrara, Sune Lehmann

CoRR, 2017

Measuring Personalization of Web Search.

Anikó Hannák, Piotr Sapiezynski, Arash Molavi Khaki, David Lazer, Alan Mislove, Christo Wilson

CoRR, 2017

2016

Evidence for a Conserved Quantity in Human Mobility.

Laura Alessandretti, Piotr Sapiezynski, Sune Lehmann, Andrea Baronchelli

CoRR, 2016

2015

Temporal Fidelity in Dynamic Social Networks.

Arkadiusz Stopczynski, Piotr Sapiezynski, Alex Pentland, Sune Lehmann

CoRR, 2015

Tracking Human Mobility using WiFi signals.

Piotr Sapiezynski, Arkadiusz Stopczynski, Radu Gatej, Sune Lehmann

CoRR, 2015

Opportunities and Challenges in Crowdsourced Wardriving.

Piotr Sapiezynski, Radu Gatej, Alan Mislove, Sune Lehmann

Proceedings of the 2015 ACM Internet Measurement Conference, 2015

2014

Measuring large-scale social networks with high resolution. WORKING PAPER.

Arkadiusz Stopczynski, Vedran Sekara, Piotr Sapiezynski, Andrea Cuttone, Jakob Eg Larsen, Sune Lehmann

CoRR, 2014

2013

Measuring personalization of web search.

Aniko Hannak, Piotr Sapiezynski, Arash Molavi Kakhki, Balachander Krishnamurthy, David Lazer, Alan Mislove, Christo Wilson

Proceedings of the 22nd International World Wide Web Conference, 2013

Crowds, bluetooth, and rock'n'roll: understanding music festival participant behavior.

Jakob Eg Larsen, Piotr Sapiezynski, Arkadiusz Stopczynski, Morten Mørup, Rasmus Theodorsen

Proceedings of the 1st ACM international workshop on Personal data meets distributed multimedia, 2013