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- W3185689022 abstract "Abstract We show that a competitive equilibrium always exists in combinatorial auctions with anonymous graphical valuations and pricing, using discrete geometry. This is an intuitive and easy-to-construct class of valuations that can model both complementarity and substitutes, and to our knowledge, it is the first class besides gross substitutes that have guaranteed competitive equilibrium. We prove through counter-examples that our result is tight, and we give explicit algorithms for constructing competitive pricing vectors. We also give extensions to multi-unit combinatorial auctions (also known as product-mix auctions). Combined with theorems on graphical valuations and pricing equilibrium of Candogan, Ozdagar and Parrilo, our results indicate that quadratic pricing is a highly practical method to run combinatorial auctions." @default.
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- W3185689022 date "2022-12-08" @default.
- W3185689022 modified "2023-10-18" @default.
- W3185689022 title "Competitive Equilibrium Always Exists for Combinatorial Auctions with Graphical Pricing Schemes" @default.
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- W3185689022 doi "https://doi.org/10.1007/s44007-022-00038-7" @default.
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