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24 June 2024
 
  » arxiv » 2302.00377

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Autobidding Auctions in the Presence of User Costs
Yuan Deng ; Jieming Mao ; Vahab Mirrokni ; Hanrui Zhang ; Song Zuo ;
Date 1 Feb 2023
AbstractWe study autobidding ad auctions with user costs, where each bidder is value-maximizing subject to a return-over-investment (ROI) constraint, and the seller aims to maximize the social welfare taking into consideration the user’s cost of viewing an ad. We show that in the worst case, the approximation ratio of social welfare by running the vanilla VCG auctions with user costs could as bad as 0. To improve the performance of VCG, We propose a new variant of VCG based on properly chosen cost multipliers, and prove that there exist auction-dependent and bidder-dependent cost multipliers that guarantee approximation ratios of 1/2 and 1/4 respectively in terms of the social welfare.
Source arXiv, 2302.00377
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