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Published in: Social Choice and Welfare 4/2015

01-04-2015

A note on the Sobolev consistency of linear symmetric values

Author: Norman L. Kleinberg

Published in: Social Choice and Welfare | Issue 4/2015

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Abstract

In van den Brink et al. (Soc Choice Welf 40:693–714, 2013) it is demonstrated that every \(\alpha \)-egalitarian value (Joosten in Dynamics, equilibria and values dissertation, Maastricht University, Maastricht, 1996) is consistent with respect to the well-known Sobolev reduced game function. However, the authors did not consider the question of whether or not these were the only Sobolev-consistent values. In this note we delineate, in the context of cooperative games with transferable utility and linear, symmetric and efficient values, the entire set of solutions that are consistent with respect to the Sobolev function.

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Footnotes
1
We hasten to add this is nothing new; for example, and as we note below, a number of authors have accounted for this dependence by choosing to include the grand coalition as an argument to the solution itself. It is just that, in the model we consider herein, a value family is a natural construct.
 
2
What we here call symmetry is there called “anonymity”; we stick to the former as this is the term, now common in the literature, that was originally used in Shapley (1953).
 
3
Note that (2) does not agree with the “usual” definition of permuted game, which is \(\sigma v(S) = v(\sigma (S))\). However, it is easy to show that our symmetry axiom is equivalent to the usual one. Also, (2) does agree with the definition in Shapley (1953).
 
4
We note it follows directly from (3) that every value \(\psi ^2\) formally satisfies \(\alpha \)-standardness for two-player games, with \(\alpha = c^1_1\), although of course this property is only actually defined for \(\alpha \in [0,1]\).
 
5
This is the operation of “\(\fancyscript{B}\)-scaling” as defined in Driessen (2010), which also contains, in a different guise, a result analogous to, but not the same as, our Proposition 1.
 
6
Note we are not claiming this particular perspective is novel, merely that it is one permitting us to focus on questions of marginality and egalitarianism.
 
Literature
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go back to reference Joosten R (1996) Dynamics, equilibria and values dissertation. Maastricht University, Maastricht Joosten R (1996) Dynamics, equilibria and values dissertation. Maastricht University, Maastricht
go back to reference Kleinberg NL, Weiss JH (1986) Weak values, the core and new axioms for the Shapley value. Math Soc Sci 12:21–30CrossRef Kleinberg NL, Weiss JH (1986) Weak values, the core and new axioms for the Shapley value. Math Soc Sci 12:21–30CrossRef
go back to reference Shapley LS (1953) A value for n-person games. Ann Math Stud 28:307–317 Shapley LS (1953) A value for n-person games. Ann Math Stud 28:307–317
go back to reference Sobolev AI (1973) The functional equations that give the payoffs of the players in an n-person game. In: Vilkas E (ed) Advances in game theory, ”Mintis”. Vilnius, pp 94–151. (in Russian) Sobolev AI (1973) The functional equations that give the payoffs of the players in an n-person game. In: Vilkas E (ed) Advances in game theory, ”Mintis”. Vilnius, pp 94–151. (in Russian)
go back to reference van den Brink R, Funaki Y, Ju Y (2013) Reconciling marginalism with egalitarianism: consistency, monotonicity, and implementation of egalitarian Shapley values. Soc Choice Welf 40:693–714CrossRef van den Brink R, Funaki Y, Ju Y (2013) Reconciling marginalism with egalitarianism: consistency, monotonicity, and implementation of egalitarian Shapley values. Soc Choice Welf 40:693–714CrossRef
Metadata
Title
A note on the Sobolev consistency of linear symmetric values
Author
Norman L. Kleinberg
Publication date
01-04-2015
Publisher
Springer Berlin Heidelberg
Published in
Social Choice and Welfare / Issue 4/2015
Print ISSN: 0176-1714
Electronic ISSN: 1432-217X
DOI
https://doi.org/10.1007/s00355-014-0859-y

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