Search Results for author: Will Ma

Found 7 papers, 0 papers with code

VC Theory for Inventory Policies

no code implementations17 Apr 2024 Yaqi Xie, Will Ma, Linwei Xin

Second, the number of parameters in a policy class may not be the correct measure of overfitting error: in fact, the class of policies defined by T time-varying base-stock levels exhibits a generalization error comparable to that of the two-parameter (s, S) policy class.

Management

From Contextual Data to Newsvendor Decisions: On the Actual Performance of Data-Driven Algorithms

no code implementations16 Feb 2023 Omar Besbes, Will Ma, Omar Mouchtaki

This class includes classical policies such as ERM, k-Nearest Neighbors and kernel-based policies.

Decision Making

Degeneracy is OK: Logarithmic Regret for Network Revenue Management with Indiscrete Distributions

no code implementations14 Oct 2022 Jiashuo Jiang, Will Ma, Jiawei Zhang

We study the classical Network Revenue Management (NRM) problem with accept/reject decisions and $T$ IID arrivals.

Management

Beyond IID: data-driven decision-making in heterogeneous environments

no code implementations20 Jun 2022 Omar Besbes, Will Ma, Omar Mouchtaki

We then leverage this connection to quantify the performance that is achievable by Sample Average Approximation (SAA) as a function of the radius of the heterogeneity ball: for any integral probability metric, we derive bounds depending on the approximation parameter, a notion which quantifies how the interplay between the heterogeneity and the problem structure impacts the performance of SAA.

Decision Making

Fairness Maximization among Offline Agents in Online-Matching Markets

no code implementations18 Sep 2021 Will Ma, Pan Xu, Yifan Xu

Examples of online and offline agents include keywords (online) and sponsors (offline) in Google Advertising; workers (online) and tasks (offline) in Amazon Mechanical Turk (AMT); riders (online) and drivers (offline when restricted to a short time window) in ridesharing.

Decision Making Fairness

The Convex Relaxation Barrier, Revisited: Tightened Single-Neuron Relaxations for Neural Network Verification

no code implementations NeurIPS 2020 Christian Tjandraatmadja, Ross Anderson, Joey Huchette, Will Ma, Krunal Patel, Juan Pablo Vielma

We improve the effectiveness of propagation- and linear-optimization-based neural network verification algorithms with a new tightened convex relaxation for ReLU neurons.

Inventory Balancing with Online Learning

no code implementations11 Oct 2018 Wang Chi Cheung, Will Ma, David Simchi-Levi, Xinshang Wang

We overcome both the challenges of model uncertainty and customer heterogeneity by judiciously synthesizing two algorithmic frameworks from the literature: inventory balancing, which "reserves" a portion of each resource for high-reward customer types which could later arrive, and online learning, which shows how to "explore" the resource consumption distributions of each customer type under different actions.

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