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Dynamics of Distributed Updating in Fisher Markets

Published: 11 June 2018 Publication History

Abstract

A major goal in Algorithmic Game Theory is to justify equilibrium concepts from an algorithmic and complexity perspective. One appealing approach is to identify natural distributed algorithms that converge quickly to an equilibrium. This paper established new convergence results for two generalizations of proportional response in Fisher markets with buyers having CES utility functions. The starting points are respectively a new convex and a new convex-concave formulation of such markets. The two generalizations correspond to suitable mirror descent algorithms applied to these formulations. Several of our new results are a consequence of new notions of strong Bregman convexity and of strong Bregman convex-concave functions, and associated linear rates of convergence, which may be of independent interest. Among other results, we analyze a damped generalized proportional response and show a linear rate of convergence in a Fisher market with buyers whose utility functions cover the full spectrum of CES utilities aside the extremes of linear and Leontief utilities; when these utilities are included, we obtain an empirical $O(1/T)$ rate of convergence.

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cover image ACM Conferences
EC '18: Proceedings of the 2018 ACM Conference on Economics and Computation
June 2018
713 pages
ISBN:9781450358293
DOI:10.1145/3219166
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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Published: 11 June 2018

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Author Tags

  1. bregman divergence
  2. fisher market
  3. mirror descent
  4. proportional response

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EC '18 Paper Acceptance Rate 70 of 269 submissions, 26%;
Overall Acceptance Rate 664 of 2,389 submissions, 28%

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  • (2023)An Auction Algorithm for Market Equilibrium with Weak Gross Substitute DemandsACM Transactions on Economics and Computation10.1145/3624558Online publication date: 14-Sep-2023
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