Equilibrium in a Bargaining Game of Two Sellers and Two Buyers

The uniqueness of equilibrium in bargaining games with three or more players is a problem preventing bargaining theory from general real world applications. We study the uniqueness of bargaining equilibrium in a bargaining game of two sellers and two buyers, which has instances in real-world markets...

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Main Authors: Jiawei Li, Tianxiang Cui, Graham Kendall
Format: Article
Language:English
Published: MDPI AG 2022-07-01
Series:Mathematics
Subjects:
Online Access:https://www.mdpi.com/2227-7390/10/15/2705
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author Jiawei Li
Tianxiang Cui
Graham Kendall
author_facet Jiawei Li
Tianxiang Cui
Graham Kendall
author_sort Jiawei Li
collection DOAJ
description The uniqueness of equilibrium in bargaining games with three or more players is a problem preventing bargaining theory from general real world applications. We study the uniqueness of bargaining equilibrium in a bargaining game of two sellers and two buyers, which has instances in real-world markets. Each seller (or buyer) wants to reach an agreement with a buyer (or seller) on the division of a pie in the bargaining game. A seller and a buyer will receive their agreed divisions if they can reach an agreement. Otherwise, they receive nothing. The bargaining game includes a finite number of rounds. In each round, a player can propose an offer or accept an offer. Each player has a constant discounting factor. Under the assumption of complete information, we prove that the equilibrium of this bargaining game is the same division of two pies. The ratio of division as a function of the discount factors of all players is also deduced. The result can be extended to a bargaining game of <i>n</i>-sellers and <i>n</i>-buyers, which reveals the relevance of bargaining equilibrium to the general equilibrium of a market.
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spelling doaj.art-1596d5e4fb4744cdb1293d8f06d8312c2023-11-30T22:38:19ZengMDPI AGMathematics2227-73902022-07-011015270510.3390/math10152705Equilibrium in a Bargaining Game of Two Sellers and Two BuyersJiawei Li0Tianxiang Cui1Graham Kendall2School of Computer Science, University of Nottingham Ningbo China, Ningbo 315100, ChinaSchool of Computer Science, University of Nottingham Ningbo China, Ningbo 315100, ChinaSchool of Computer Science, University of Nottingham UK, Nottingham NG7 2RD, UKThe uniqueness of equilibrium in bargaining games with three or more players is a problem preventing bargaining theory from general real world applications. We study the uniqueness of bargaining equilibrium in a bargaining game of two sellers and two buyers, which has instances in real-world markets. Each seller (or buyer) wants to reach an agreement with a buyer (or seller) on the division of a pie in the bargaining game. A seller and a buyer will receive their agreed divisions if they can reach an agreement. Otherwise, they receive nothing. The bargaining game includes a finite number of rounds. In each round, a player can propose an offer or accept an offer. Each player has a constant discounting factor. Under the assumption of complete information, we prove that the equilibrium of this bargaining game is the same division of two pies. The ratio of division as a function of the discount factors of all players is also deduced. The result can be extended to a bargaining game of <i>n</i>-sellers and <i>n</i>-buyers, which reveals the relevance of bargaining equilibrium to the general equilibrium of a market.https://www.mdpi.com/2227-7390/10/15/2705bargainingNash bargaining equilibriumbargaining game of two sellers and two buyers
spellingShingle Jiawei Li
Tianxiang Cui
Graham Kendall
Equilibrium in a Bargaining Game of Two Sellers and Two Buyers
Mathematics
bargaining
Nash bargaining equilibrium
bargaining game of two sellers and two buyers
title Equilibrium in a Bargaining Game of Two Sellers and Two Buyers
title_full Equilibrium in a Bargaining Game of Two Sellers and Two Buyers
title_fullStr Equilibrium in a Bargaining Game of Two Sellers and Two Buyers
title_full_unstemmed Equilibrium in a Bargaining Game of Two Sellers and Two Buyers
title_short Equilibrium in a Bargaining Game of Two Sellers and Two Buyers
title_sort equilibrium in a bargaining game of two sellers and two buyers
topic bargaining
Nash bargaining equilibrium
bargaining game of two sellers and two buyers
url https://www.mdpi.com/2227-7390/10/15/2705
work_keys_str_mv AT jiaweili equilibriuminabargaininggameoftwosellersandtwobuyers
AT tianxiangcui equilibriuminabargaininggameoftwosellersandtwobuyers
AT grahamkendall equilibriuminabargaininggameoftwosellersandtwobuyers