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SODA
2012
ACM
245views Algorithms» more  SODA 2012»
8 years 1 months ago
Sketching valuation functions
Motivated by the problem of querying and communicating bidders’ valuations in combinatorial auctions, we study how well different classes of set functions can be sketched. More...
Ashwinkumar Badanidiyuru, Shahar Dobzinski, Hu Fu,...
STOC
2012
ACM
221views Algorithms» more  STOC 2012»
8 years 1 months ago
From query complexity to computational complexity
We consider submodular optimization problems, and provide a general way of translating oracle inapproximability results arising from the symmetry gap technique to computational co...
Shahar Dobzinski, Jan Vondrák
CORR
2012
Springer
218views Education» more  CORR 2012»
8 years 6 months ago
On the Hardness of Welfare Maximization in Combinatorial Auctions with Submodular Valuations
We present a new type of monotone submodular functions: multi-peak submodular functions. Roughly speaking, given a family of sets F, we construct a monotone submodular function f ...
Shahar Dobzinski, Jan Vondrák
EOR
2011
140views more  EOR 2011»
9 years 2 months ago
Compact bidding languages and supplier selection for markets with economies of scale and scope
Combinatorial auctions have been used in procurement markets with economies of scope. Preference elicitation is already a problem in single-unit combinatorial auctions, but it bec...
Martin Bichler, Stefan Schneider, Kemal Guler, Meh...
SIGECOM
2008
ACM
152views ECommerce» more  SIGECOM 2008»
9 years 10 months ago
On characterizations of truthful mechanisms for combinatorial auctions and scheduling
We characterize truthful mechanisms in two multi-parameter domains. The first characterization shows that every mechanism for combinatorial auctions with two subadditive bidders t...
Shahar Dobzinski, Mukund Sundararajan
JAL
2008
139views more  JAL 2008»
9 years 10 months ago
A test suite for the evaluation of mixed multi-unit combinatorial auctions
Mixed Multi-Unit Combinatorial Auctions extend and generalize all the preceding types of combinatorial auctions. In this paper, we try to make headway on the practical application...
Meritxell Vinyals, Andrea Giovannucci, Jesú...
ATAL
2010
Springer
9 years 10 months ago
Time constraints in mixed multi-unit combinatorial auctions
We extend the framework of mixed multi-unit combinatorial auctions to include time constraints, present an expressive bidding language, and show how to solve the winner determinati...
Andreas Witzel, Ulle Endriss
ATAL
2010
Springer
9 years 11 months ago
Parameterizing the winner determination problem for combinatorial auctions
Combinatorial auctions have been studied by the multiagent systems community for some time, since these auctions are an effective mechanism for resource allocation when agents are...
David Loker, Kate Larson
ICMAS
2000
9 years 12 months ago
Integer Programming for Combinatorial Auction Winner Determination
Combinatorial auctions are important as they enable bidders to place bids on combinations of items; compared to other auction mechanisms, they often increase the efficiency of the...
Arne Andersson, Mattias Tenhunen, Fredrik Ygge
AAAI
2000
9 years 12 months ago
Improved Algorithms for Optimal Winner Determination in Combinatorial Auctions and Generalizations
Combinatorial auctions can be used to reach efficient resource and task allocations in multiagent systems where the items are complementary. Determining the winners is NP-complete...
Tuomas Sandholm, Subhash Suri
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