Separating the communication complexity of truthful and non-truthful combinatorial auctions

Separating the communication complexity of truthful and non-truthful combinatorial auctions
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区分真实和非真实组合拍卖的通信复杂性

DOI:
10.1145/3357713.3384267
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发表时间:
2020
期刊:
Symposium on Theory of Computing
影响因子:
--
通讯作者:
Weinberg, S. Matthew
Weinberg, S. Matthew
中科院分区:
--
文献类型:
--
作者:
Assadi, Sepehr;Khandeparkar, Hrishikesh;Saxena, Raghuvansh R.;Weinberg, S. Matthew

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我们证明了第一次分离的近似保证可实现的真实和非真实的组合拍卖多项式通信。具体地说,我们证明任何真实的拍卖保证两个具有XOS估值的买家的(34 - 1240+ ε 2·m)-近似需要exp(Ω(ε2·m))通信,而Feige [J.Comput.2009]的非真实拍卖已经知道在(m)通信中实现34-近似。我们通过证明任何同时拍卖获得真实拍卖的下限,(不一定是真实的),这保证了(34−1240+ε)-近似需要通信exp(Ω(ε2·m)),然后应用Dobzinski [FOCS 2016]的税收复杂性框架将下限扩展到所有真实拍卖(包括交互式真实拍卖)。
We prove the first separation in the approximation guarantee achievable by truthful and non-truthful combinatorial auctions with polynomial communication. Specifically, we prove that any truthful auction guaranteeing a (34−1240+є)-approximation for two buyers with XOS valuations overmitems requires exp(Ω(ε2·m)) communication whereas a non-truthful auction by Feige [J. Comput.2009] is already known to achieve a 34-approximation in (m) communication.We obtain our lower bound for truthful auctions by proving that any simultaneous auction (not necessarily truthful) which guarantees a (34−1240+ε)-approximation requires communication exp(Ω(ε2·m)), and then apply the taxation complexity framework of Dobzinski [FOCS 2016] to extend the lower bound to all truthful auctions (including interactive truthful auctions).
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DOI: --
发表时间: 2010
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影响因子: 2.5
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