News

2025

• 2025.02: I am excited to announce that I will join INSEAD as an Assistant Professor of Decision Sciences this Fall!
  • I will be based in INSEAD’s Asia Campus in Singapore.
• 2025.02: Our paper, The Geometry of Categorical and Hierarchical Concepts in LLMs, is accepted to ICLR 2025 for an oral presentation (top 1.8%)!
  • Building upon our recent ICML paper, we formalize the representations of categorical concepts in LLMs and show that hierarchical relations between concepts are represented as orthogonality.
  • Joint work with Kiho Park, Yibo Jiang, and Victor Veitch.
• 2025.02: A fully revised version of our paper, Combining Evidence Across Filtrations, is now on arXiv.
  • The updated preprint includes new empirical results on financial data.
  • Joint work with Aaditya Ramdas.

2024

• 2024.12: I attended ICSDS 2024 to give an invited talk titled “Mind the Filtration: E-processes vs. P-processes at Stopping Times.”
  • Slides are available here.
  • This talk is based on our recent work on Combining Evidence Across Filtrations.
• 2024.10: New blog post in the UChicago DSI Blog: a non-technical intro to game-theoretic statistics, e-values, and my recent work with Aaditya Ramdas on Combining Evidence Across Filtrations.
  • It is cross-posted on my webpage as well: see here.
• 2024.10: I attended INFORMS 2024 to present my NeurIPS'23 paper titled Counterfactually Comparing Abstaining Classifiers (Session: “Causal Inference”).
  • Slides are available here.
• 2024.09: I am on the 2024–2025 academic job market for faculty positions in Statistics, Data Science, Machine Learning, and Operations Research.
  • Please refer to my CV for more details.
• 2024.08: I attended JSM 2024 to present our recent work on Combining Evidence Across Filtrations.
  • Slides are available here.
• 2024.07: Our recent preprint, titled The Geometry of Categorical and Hierarchical Concepts in LLMs, just won the Best Paper Award at the ICML 2024 Workshop on Mechanistic Interpretability!
  • Joint work with Kiho Park, Yibo Jiang, and Victor Veitch.
• 2024.06: A substantially revised version of our paper, Combining Evidence Across Filtrations, is now on arXiv.
  • The updated preprint includes new results, including a formal characterization of adjusters as “e-lifters”.
  • Joint work with Aaditya Ramdas.
• 2024.05: Our paper on The Linear Representation Hypothesis and the Geometry of LLMs is accepted to ICML 2024!
  • This is an exciting foundational work on how we can formalize different notions of linear representations in LLMs (e.g., linear probes and steering vectors) and unify those notions by identifying an inner product that encodes semantic structure.
  • Joint work with Kiho Park and Victor Veitch.
• 2024.02: Our new preprint, titled Combining Evidence Across Filtrations, is now available on arXiv.
  • We address an intriguing challenge for sequential inference that arises when combining e-processes constructed on different information sets.
  • Joint work with Aaditya Ramdas.

2023

• 2023.11: Our new preprint (my first one at UChicago DSI), titled The Linear Representation Hypothesis and the Geometry of LLMs, is now available on arXiv.
  • Joint work with Kiho Park and Victor Veitch.
  • The paper is also accepted for oral and poster presentations at the NeurIPS 2023 Workshop on Causal Representation Learning (CRL).
• 2023.09: Our recent paper, titled Counterfactually Comparing Abstaining Classifiers, is accepted to NeurIPS 2023!
  • This work develops an interesting connection between abstaining classifiers, causal inference, and black-box evaluation in ML.
  • Joint work with Aditya Gangrade and Aaditya Ramdas.
• 2023.09: I am excited to start my new position as a Postdoctoral Scholar at the UChicago Data Science Institute! My mentor is Victor Veitch.

• 2023.07: Our paper on Comparing Sequential Forecasters is now accepted for publication in Operations Research!
  • This is joint work with Aaditya Ramdas.
• 2023.06: I defended my Ph.D. Thesis at Carnegie Mellon University!
  • Here are the slides from my thesis defense.
  • I am grateful to my committee members: Aaditya Ramdas (Chair), Aarti Singh, Edward Kennedy, Johanna Ziegel, and Alexander D’Amour.