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Implementing Fairness Constraints in Markets Using Taxes and Subsidies

Published: 12 June 2023 Publication History

Abstract

Fisher markets are those where buyers with budgets compete for scarce items, a natural model for many real world markets including online advertising. A market equilibrium is a set of prices and allocations of items such that supply meets demand. We show how market designers can use taxes or subsidies in Fisher markets to ensure that market equilibrium outcomes fall within certain constraints. We show how these taxes and subsidies can be computed even in an online setting where the market designer does not have access to private valuations. We adapt various types of fairness constraints proposed in existing literature to the market case and show who benefits and who loses from these constraints, as well as the extent to which properties of markets including Pareto optimality, envy-freeness, and incentive compatibility are preserved. We find that some prior discussed constraints have few guarantees in terms of who is made better or worse off by their imposition.

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  • (2023)Markovian Search with Socially Aware ConstraintsSSRN Electronic Journal10.2139/ssrn.4347447Online publication date: 2023

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    cover image ACM Other conferences
    FAccT '23: Proceedings of the 2023 ACM Conference on Fairness, Accountability, and Transparency
    June 2023
    1929 pages
    ISBN:9798400701924
    DOI:10.1145/3593013
    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 the author(s) 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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    Published: 12 June 2023

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    • (2023)Markovian Search with Socially Aware ConstraintsSSRN Electronic Journal10.2139/ssrn.4347447Online publication date: 2023

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