Search Results for author: Katrina Ligett

Found 17 papers, 3 papers with code

Efficiency in Collective Decision-Making via Quadratic Transfers

no code implementations15 Jan 2023 Jon X. Eguia, Nicole Immorlica, Steven P. Lalley, Katrina Ligett, Glen Weyl, Dimitrios Xefteris

Consider the following collective choice problem: a group of budget constrained agents must choose one of several alternatives.

Decision Making

Generalization in the Face of Adaptivity: A Bayesian Perspective

no code implementations NeurIPS 2023 Moshe Shenfeld, Katrina Ligett

Repeated use of a data sample via adaptively chosen queries can rapidly lead to overfitting, wherein the empirical evaluation of queries on the sample significantly deviates from their mean with respect to the underlying data distribution.

Gaming Helps! Learning from Strategic Interactions in Natural Dynamics

no code implementations17 Feb 2020 Yahav Bechavod, Katrina Ligett, Zhiwei Steven Wu, Juba Ziani

We consider an online regression setting in which individuals adapt to the regression model: arriving individuals are aware of the current model, and invest strategically in modifying their own features so as to improve the predicted score that the current model assigns to them.

Causal Discovery regression

Learn to Expect the Unexpected: Probably Approximately Correct Domain Generalization

no code implementations13 Feb 2020 Vikas K. Garg, Adam Kalai, Katrina Ligett, Zhiwei Steven Wu

Domain generalization is the problem of machine learning when the training data and the test data come from different data domains.

Domain Generalization feature selection

Privately Learning Thresholds: Closing the Exponential Gap

no code implementations22 Nov 2019 Haim Kaplan, Katrina Ligett, Yishay Mansour, Moni Naor, Uri Stemmer

This problem has received much attention recently; unlike the non-private case, where the sample complexity is independent of the domain size and just depends on the desired accuracy and confidence, for private learning the sample complexity must depend on the domain size $X$ (even for approximate differential privacy).

A New Analysis of Differential Privacy's Generalization Guarantees

no code implementations9 Sep 2019 Christopher Jung, Katrina Ligett, Seth Neel, Aaron Roth, Saeed Sharifi-Malvajerdi, Moshe Shenfeld

This second claim follows from a thought experiment in which we imagine that the dataset is resampled from the posterior distribution after the mechanism has committed to its answers.

A necessary and sufficient stability notion for adaptive generalization

no code implementations NeurIPS 2019 Katrina Ligett, Moshe Shenfeld

We introduce a new notion of the stability of computations, which holds under post-processing and adaptive composition.

Learning to Prune: Speeding up Repeated Computations

no code implementations26 Apr 2019 Daniel Alabi, Adam Tauman Kalai, Katrina Ligett, Cameron Musco, Christos Tzamos, Ellen Vitercik

We present an algorithm that learns to maximally prune the search space on repeated computations, thereby reducing runtime while provably outputting the correct solution each period with high probability.

Equal Opportunity in Online Classification with Partial Feedback

1 code implementation NeurIPS 2019 Yahav Bechavod, Katrina Ligett, Aaron Roth, Bo Waggoner, Zhiwei Steven Wu

We study an online classification problem with partial feedback in which individuals arrive one at a time from a fixed but unknown distribution, and must be classified as positive or negative.

Classification Decision Making Under Uncertainty +3

Accuracy First: Selecting a Differential Privacy Level for Accuracy Constrained ERM

no code implementations NeurIPS 2017 Katrina Ligett, Seth Neel, Aaron Roth, Bo Waggoner, Steven Z. Wu

Traditional approaches to differential privacy assume a fixed privacy requirement ε for a computation, and attempt to maximize the accuracy of the computation subject to the privacy constraint.

Accuracy First: Selecting a Differential Privacy Level for Accuracy-Constrained ERM

1 code implementation30 May 2017 Katrina Ligett, Seth Neel, Aaron Roth, Bo Waggoner, Z. Steven Wu

Traditional approaches to differential privacy assume a fixed privacy requirement $\epsilon$ for a computation, and attempt to maximize the accuracy of the computation subject to the privacy constraint.

Adaptive Learning with Robust Generalization Guarantees

no code implementations24 Feb 2016 Rachel Cummings, Katrina Ligett, Kobbi Nissim, Aaron Roth, Zhiwei Steven Wu

We also show that perfect generalization is a strictly stronger guarantee than differential privacy, but that, nevertheless, many learning tasks can be carried out subject to the guarantees of perfect generalization.

Truthful Linear Regression

no code implementations10 Jun 2015 Rachel Cummings, Stratis Ioannidis, Katrina Ligett

We consider the problem of fitting a linear model to data held by individuals who are concerned about their privacy.

regression

A Simple and Practical Algorithm for Differentially Private Data Release

no code implementations NeurIPS 2012 Moritz Hardt, Katrina Ligett, Frank McSherry

We present a new algorithm for differentially private data release, based on a simple combination of the Exponential Mechanism with the Multiplicative Weights update rule.

Differentially Private Combinatorial Optimization

no code implementations26 Mar 2009 Anupam Gupta, Katrina Ligett, Frank McSherry, Aaron Roth, Kunal Talwar

Is it even possible to design good algorithms for this problem that preserve the privacy of the clients?

Data Structures and Algorithms Cryptography and Security Computer Science and Game Theory

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