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My main research interests are in machine learning theory, approximation
algorithms, on-line algorithms, algorithmic game theory /
mechanism design, algorithmic fairness, and non-worst-case
analysis of algorithms. Many years ago I also did work in AI Planning. I am a member of the Simons Collaboration on the Theory of Algorithmic Fairness.
Before joining TTIC, I was a faculty member in the Computer Science Department at Carnegie Mellon University from 1992 to 2017.
I am on the Steering Committees for ITCS and FORC, on the editorial board for JACM, and on the Advisory Board of a new open access journal TheoretiCS. I am also on the Advisory Committee/Board for the Learning Theory Alliance and The Institute for Learning-enabled Optimization at Scale. I was Program Chair for the 2019 Innovations in Theoretical Computer Science (ITCS) Conference, on the Organizing Committee for the STOC 2018 and STOC 2017 Theory Fest, and a member of the SafeToC committee. For more information on my research, see the publications and research interests links below.
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Current PhD advisees: Keziah Naggita (jointly advised with Matt Walter), Kavya Ravichandran, Melissa Dutz, Donya Saless, Hirota Kinoshita
Former PhD advisees: Prasad Chalasani, Santosh Vempala, Carl Burch, Adam Tauman Kalai, John Langford, Nikhil Bansal, Martin Zinkevich, Shuchi Chawla, Brendan McMahan, Maria-Florina (Nina) Balcan, Shobha Venkataraman, Mugizi Robert Rwebangira, Katrina Ligett, Aaron Roth, Or Sheffet, Pranjal Awasthi, Liu Yang, Ankit Sharma, Jamie Morgenstern, Nika Haghtalab. Kevin Stangl, Han Shao, Naren Manoj
Though I am no longer at CMU, I endorse the CMU SCS Reasonable Person Principle which basically asks people to be reasonable and assume everyone else is doing likewise.
Note: Scammers are starting to use my name. I will never send an email that says "Good afternoon and happy Thursday!", I will never ask for gift cards, etc.