Search Results for author: Alexander Wei

Found 8 papers, 4 papers with code

Covert Malicious Finetuning: Challenges in Safeguarding LLM Adaptation

no code implementations28 Jun 2024 Danny Halawi, Alexander Wei, Eric Wallace, Tony T. Wang, Nika Haghtalab, Jacob Steinhardt

Black-box finetuning is an emerging interface for adapting state-of-the-art language models to user needs.

Learning in Stackelberg Games with Non-myopic Agents

1 code implementation19 Aug 2022 Nika Haghtalab, Thodoris Lykouris, Sloan Nietert, Alexander Wei

Although learning in Stackelberg games is well-understood when the agent is myopic, dealing with non-myopic agents poses additional complications.

TCT: Convexifying Federated Learning using Bootstrapped Neural Tangent Kernels

1 code implementation13 Jul 2022 Yaodong Yu, Alexander Wei, Sai Praneeth Karimireddy, Yi Ma, Michael I. Jordan

Leveraging this observation, we propose a Train-Convexify-Train (TCT) procedure to sidestep this issue: first, learn features using off-the-shelf methods (e. g., FedAvg); then, optimize a convexified problem obtained from the network's empirical neural tangent kernel approximation.

Federated Learning

More Than a Toy: Random Matrix Models Predict How Real-World Neural Representations Generalize

no code implementations11 Mar 2022 Alexander Wei, Wei Hu, Jacob Steinhardt

On the other hand, we find that the classical GCV estimator (Craven and Wahba, 1978) accurately predicts generalization risk even in such overparameterized settings.

regression

Predicting Out-of-Distribution Error with the Projection Norm

1 code implementation11 Feb 2022 Yaodong Yu, Zitong Yang, Alexander Wei, Yi Ma, Jacob Steinhardt

Projection Norm first uses model predictions to pseudo-label test samples and then trains a new model on the pseudo-labels.

Pseudo Label text-classification +1

Learning Equilibria in Matching Markets from Bandit Feedback

no code implementations NeurIPS 2021 Meena Jagadeesan, Alexander Wei, Yixin Wang, Michael I. Jordan, Jacob Steinhardt

Large-scale, two-sided matching platforms must find market outcomes that align with user preferences while simultaneously learning these preferences from data.

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