Ascending-Price Algorithms for Unknown Markets
Ascending-Price Algorithms for Unknown Markets
复制标题
未知市场的升价算法
DOI:
10.1145/3319394
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
M. Hoefer
中科院分区:
文献类型:
--
作者:
X. Bei;J. Garg;M. Hoefer
We design a simple ascending-price algorithm to compute a (1 + ε)-approximate equilibrium in Arrow-Debreu markets with weak gross substitute property. It applies to an unknown market setting without exact knowledge about the number of agents, their individual utilities, and endowments. Instead, our algorithm only uses price queries to a global demand oracle. This is the first polynomial-time algorithm for most of the known tractable classes of Arrow-Debreu markets, which computes such an equilibrium with a number of calls to the demand oracle that is polynomial in log 1/ε and avoids heavy machinery such as the ellipsoid method.Demands can be real-valued functions of prices, but the oracles only return demand values of bounded precision. Due to this more realistic assumption, precision and representation of prices and demands become a major technical challenge, and we develop new tools and insights that may be of independent interest. Furthermore, we give the first polynomial-time algorithm to compute an exact equilibrium for markets with spending constraint utilities. This resolves an open problem posed by Duan and Mehlhorn.
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DOI:
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发表时间:
1978
期刊:
影响因子:
--
作者:
M. C. Blad
通讯作者:
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DOI:
--
发表时间:
2008
期刊:
Symposium on the Theory of Computing
影响因子:
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通讯作者:
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DOI:
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2011
期刊:
Symposium on the Theory of Computing
影响因子:
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作者:
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通讯作者:
László A. Végh
影响因子:
1.1
作者:
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通讯作者:
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DOI:
--
发表时间:
2008
期刊:
2008 49th Annual IEEE Symposium on Foundations of Computer Science
影响因子:
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作者:
Nikhil R. Devanur;R. Kannan
通讯作者:
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