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Revenue Maximization and Ex-Post Budget Constraints

Published: 01 October 2018 Publication History

Abstract

We consider the problem of a revenue-maximizing seller with m items for sale to n additive bidders with hard budget constraints, assuming that the seller has some prior distribution over bidder values and budgets. The prior may be correlated across items and budgets of the same bidder, but is assumed independent across bidders. We target mechanisms that are Bayesian incentive compatible, but that are ex-post individually rational and ex-post budget respecting. Virtually no such mechanisms are known that satisfy all these conditions and guarantee any revenue approximation, even with just a single item. We provide a computationally efficient mechanism that is a 3-approximation with respect to all BIC, ex-post IR, and ex-post budget respecting mechanisms. Note that the problem is NP-hard to approximate better than a factor of 16/15, even in the case where the prior is a point mass. We further characterize the optimal mechanism in this setting, showing that it can be interpreted as a distribution over virtual welfare maximizers.
We prove our results by making use of a black-box reduction from mechanism to algorithm design developed by Cai et al. Our main technical contribution is a computationally efficient 3-approximation algorithm for the algorithmic problem that results from an application of their framework to this problem. The algorithmic problem has a mixed-sign objective and is NP-hard to optimize exactly, so it is surprising that a computationally efficient approximation is possible at all. In the case of a single item (m=1), the algorithmic problem can be solved exactly via exhaustive search, leading to a computationally efficient exact algorithm and a stronger characterization of the optimal mechanism as a distribution over virtual value maximizers.

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Cited By

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  • (2024)Mind the Revenue Gap: On the Performance of Approximation Mechanisms Under Budget ConstraintsAlgorithmic Game Theory10.1007/978-3-031-71033-9_16(279-296)Online publication date: 31-Aug-2024
  • (2023)Optimal Mechanisms for a Value Maximizer: The Futility of Screening TargetsSSRN Electronic Journal10.2139/ssrn.4351927Online publication date: 2023
  • (2022)Truthful Deep Mechanism Design for Revenue-Maximization in Edge Computing With Budget ConstraintsIEEE Transactions on Vehicular Technology10.1109/TVT.2021.312909871:1(902-914)Online publication date: Jan-2022

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Published In

cover image ACM Transactions on Economics and Computation
ACM Transactions on Economics and Computation  Volume 6, Issue 3-4
Special Issue on EC'15
November 2018
249 pages
ISSN:2167-8375
EISSN:2167-8383
DOI:10.1145/3281297
Issue’s Table of Contents
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Publication History

Published: 01 October 2018
Published in TEAC Volume 6, Issue 3-4

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Author Tags

  1. Revenue optimization
  2. budget constraints
  3. generalized assignment problem
  4. virtual welfare

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Cited By

View all
  • (2024)Mind the Revenue Gap: On the Performance of Approximation Mechanisms Under Budget ConstraintsAlgorithmic Game Theory10.1007/978-3-031-71033-9_16(279-296)Online publication date: 31-Aug-2024
  • (2023)Optimal Mechanisms for a Value Maximizer: The Futility of Screening TargetsSSRN Electronic Journal10.2139/ssrn.4351927Online publication date: 2023
  • (2022)Truthful Deep Mechanism Design for Revenue-Maximization in Edge Computing With Budget ConstraintsIEEE Transactions on Vehicular Technology10.1109/TVT.2021.312909871:1(902-914)Online publication date: Jan-2022

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