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Nash bargaining in ordinal environments

Kıbrıs, Özgür (2012) Nash bargaining in ordinal environments. Review of Economic Design, 16 (4). pp. 269-282. ISSN 1434-4742 (Print) 1434-4750 (Online)

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Official URL: http://dx.doi.org/10.1007/s10058-012-0134-6

Abstract

We analyze the implications of Nash’s (1950) axioms in ordinal bargaining environments; there, the scale invariance axiom needs to be strenghtened to take into account all order-preserving transformations of the agents’ utilities. This axiom, called ordinal invariance, is a very demanding one. For two-agents, it is violated by every strongly individually rational bargaining rule. In general, no ordinally invariant bargaining rule satisfies the other three axioms of Nash. Parallel to Roth (1977), we introduce a weaker independence of irrelevant alternatives axiom that we argue is better suited for ordinally invariant bargaining rules. We show that the three-agent Shapley-Shubik bargaining rule uniquely satisfies ordinal invariance, Pareto optimality, symmetry, and this weaker independence of irrelevant alternatives axiom. We also analyze the implications of other independence axioms.

Item Type:Article
Uncontrolled Keywords:Bargaining · Shapley–Shubik rule · Ordinal invariance · Independence of irrelevant alternatives · Brace
Subjects:H Social Sciences > HB Economic Theory
ID Code:20169
Deposited By:Özgür Kıbrıs
Deposited On:30 Nov 2012 12:45
Last Modified:22 Feb 2014 18:08

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