arXiv Machine Learning

Multi-Dimensional Matching

arXiv:2609. 29958v1 Announce Type: cross Abstract: We study a matching mechanism where agents and objects are described by features rather than complete rankings.

arXiv Machine Learning
Sep 11

No Screening is More Efficient with Multiple Objects

The paper investigates welfare‑maximizing allocation of heterogeneous objects when agents use costly effort for screening instead of monetary transfers. It shows that as the number of object types increases, no‑screening mechanisms become more efficient, reducing the need for screening. The authors prove that in a symmetric continuous market with i.i.d. log‑concave values, the multidimensional allocation problem collapses to a single‑dimensional one based on agents’ best‑option values, and they demonstrate that this no‑screening optimality persists even as variety expands, supported by large‑variety limits and numerical experiments. The findings are applied to design an invitation‑based vaccine appointment system.

By Shunya Noda, Genta Okada
arXiv AI
Sep 2

Keep Everyone Happy: Online Fair Division of Numerous Items with Few Copies

The paper introduces a new online fair division framework where a learner must allocate indivisible items to agents in real time, balancing fairness and efficiency. Traditional methods rely on many copies of each item to estimate utilities, but this is unrealistic for platforms with many users and few interactions. By treating utility as an unknown function of item-agent features and framing the problem as a contextual bandit, the authors propose algorithms that achieve sublinear regret and demonstrate their effectiveness experimentally.

By Arun Verma, Indrajit Saha, Makoto Yokoo, Bryan Kian Hsiang Low
arXiv AI
Sep 3

Fair Stable Matching: A Nash Social Welfare Approach

The paper introduces “SNSW-Alg”, an algorithm that finds a stable matching maximizing Nash social welfare in the stable marriage problem. It runs in ×O(n^4) time and balances equity while maintaining stability. Experiments across various preference distributions show significant fairness gains with minimal impact on regret, egalitarian criterion, and sex equality, and the resulting matchings are statistically Pareto-undominated by other fairness-based stable matchings.

By Parth Desai, Rasheed M, Ganesh Ghalme, Sujit Gujar
Hugging Face Trending Papers
6d ago

From Preference to Reciprocity: Decentralized Matching with Empirically Grounded LLM-agent Based Modeling

The paper introduces a dynamic bipartite matching framework that uses large language model (LLM) agents and contextual bandits to model decentralized, asynchronous matching processes without requiring full preference rankings. In a simulated Chinese marriage market, LLM agents evaluate local candidates while Logistic-UCB models learn reciprocal acceptance, leading to higher mutual welfare and fewer blocking pairs compared to classical Gale–Shapley. The study validates LLM-generated preferences against empirical data and demonstrates gender-differentiated acceptance patterns, supporting the use of decentralized LLM-based matching for economic simulation and computational social science.

arXiv Machine Learning
Aug 6

Multicalibration Yields Better Matchings

arXiv:2511. 11413v2 Announce Type: replace Abstract: Consider the problem of finding the best matching in a weighted graph where we only have access to predictions of the actual stochastic weights, based on an underlying context.

By Riccardo Colini Baldeschi, Simone Di Gregorio, Simone Fioravanti, Federico Fusco, Ido Guy, Daniel Haimovich, Stefano Leonardi, Fridolin Linder, Lorenzo Perini, Matteo Russo, Cem Sirin, Niek Tax
arXiv AI
Sep 17

Social Laws for Multi-agent Coordination in Stochastic Environments

The paper extends the concept of social laws from deterministic, goal-based multi‑agent systems to stochastic, reward‑based environments. It introduces a formalism for defining and verifying the robustness of these laws, including a new metric called α‑robustness that quantifies the utility each agent can guarantee while following the law. The authors present a verification approach that reduces the problem to solving multiple Markov decision processes and demonstrate the framework’s potential through empirical evaluations on toy environments.

By Rolando Fernandez, Caleb Probine, Tyler Lee, Jeffrey Chen, Erez Karpas, Muhammad Arrasy Rahman, Peter Stone, Ufuk Topcu
arXiv AI
Sep 12

Agentic Share-of-Search: A Multi-Agent AI System for Competitive Decision-Making in LLM-Mediated E-Commerce

The paper introduces Agentic Share-of-Search (ASoS), a multi‑agent AI system designed to aid sellers in competitive decision‑making within large‑language‑model (LLM) mediated e‑commerce. It automates competitive visibility measurement and root‑cause diagnosis by deploying query agents on leading AI platforms and employing a ReAct‑based diagnostic agent to suggest prioritized merchandising actions. A 100‑trial ablation study demonstrates the prototype’s effectiveness, recovering the ablated signal in 39% of trials (95% CI: 30.0%‑48.8%) and 63.9% in high‑correlation cases, outperforming chance by 5.5×.

By Spandan Ghose Chowdhury