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Market Pricing for Matroid Rank Valuations

Bérczi, Kristóf Kakimura, Naonori Kobayashi, Yusuke 京都大学 DOI:10.1137/20M1386335

2021

概要

In this paper, we study the problem of maximizing social welfare in combinatorial markets through pricing schemes. We consider the existence of prices that are capable of achieving optimal social welfare without a central tie-breaking coordinator. In the case of two buyers with matroid rank valuations, we give polynomial-time algorithms that always find such prices when one of the matroids is a partition matroid or both matroids are strongly base orderable. This result partially answers a question raised by Dütting and Végh [Private communication, 2017]. We further formalize a weighted variant of the conjecture of Dütting and Végh, and show that the weighted variant can be reduced to the unweighted one based on the weight-splitting theorem for weighted matroid intersection by Frank. We also show that a similar reduction technique works for M♮ -concave functions or, equivalently, for gross substitutes functions.

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Copyright © by SIAM. Unauthorized reproduction of this article is prohibited.

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Copyright © by SIAM. Unauthorized reproduction of this article is prohibited.

A Self-archived copy in

Kyoto University Research Information Repository

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Downloaded 02/07/23 to 130.54.130.253 . Redistribution subject to SIAM license or copyright; see https://epubs.siam.org/terms-privacy

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Copyright © by SIAM. Unauthorized reproduction of this article is prohibited.

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