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Social Choice and Welfare OnlineFirst articles

Open Access 03-04-2024 | Original Paper

A family of condorcet domains that are single-peaked on a circle

Fishburn’s alternating scheme domains occupy a special place in the theory of Condorcet domains. Karpov (2023) generalised these domains and made an interesting observation proving that all of them are single-peaked on a circle. However, an …

Author:
Arkadii Slinko

Open Access 02-04-2024 | Original Paper

Semi-flexible majority rules for public good provision

We introduce semi-flexible majority rules for public good provision with private valuations. Such rules take the form of a two-stage, multiple-round voting mechanism where the output of the first stage is the default alternative for the second …

Authors:
Hans Gersbach, Oriol Tejada

Open Access 01-04-2024 | Original Paper

Relaxed notions of Condorcet-consistency and efficiency for strategyproof social decision schemes

Social decision schemes (SDSs) map the preferences of a group of voters over some set of m alternatives to a probability distribution over the alternatives. A seminal characterization of strategyproof SDSs by Gibbard (Econometrica 45(3):665–681 …

Authors:
Felix Brandt, Patrick Lederer, René Romen

Open Access 30-03-2024 | Original Paper

Impartiality and relative utilitarianism

A novel axiomatization of relative utilitarianism is provided using the single-profile setting used in Harsanyi’s Social Aggregation Theorem. Harsanyi’s axioms are supplemented with an impartiality axiom that requires social alternative lotteries …

Authors:
Edi Karni, John A. Weymark

Open Access 28-03-2024 | Correction

Correction: Approval-based voting with mixed goods

Authors:
Xinhang Lu, Jannik Peters, Haris Aziz, Xiaohui Bei, Warut Suksompong

Open Access 28-03-2024 | Original Paper

Berge equilibrium, altruism and social welfare

Welfare and other properties of Berge equilibria are investigated. In particular, we address the questions to what extent Berge equilibrium can select from multiple Nash equilibria; can serve as a substitute for Nash equilibria; can Pareto improve …

Author:
Hans Haller

Open Access 27-03-2024 | Original Paper

Forms of new democracy

In the third decade of the 21st century, digitization and artificial intelligence, global events, challenges from authoritarian states, and difficulties of particular democracies to function properly confront democracy with a new series of …

Author:
Hans Gersbach

Open Access 20-03-2024 | Original Paper

Dynamic proportional rankings

Proportional ranking rules aggregate approval-style preferences of agents into a collective ranking such that groups of agents with similar preferences are adequately represented. Motivated by the application of live Q&A platforms, where submitted …

Authors:
Jonas Israel, Markus Brill

Open Access 14-03-2024 | Original Paper

Christian Klamler’s ”A distance measure for choice functions” [Social Choice and Welfare 30 (2008) 419–425]: a correction

An extensive choice over X is a function assigning to any subset S of X a possibly empty subset of S. Klamler (Soc Choice Welf 30:419–425, 2008) shows that the operation of symmetric difference induces a metric on the family of extensive choices …

Authors:
Davide Carpentiere, Alfio Giarlotta, Stephen Watson

14-03-2024 | Original Paper

A general impossibility theorem on Pareto efficiency and Bayesian incentive compatibility

This paper studies a general class of social choice problems in which agents’ payoff functions (or types) are privately observable random variables, and monetary transfers are not available. We consider cardinal social choice functions which may …

Authors:
Kazuya Kikuchi, Yukio Koriyama

13-03-2024 | Original Paper

Axiomatization of some power indices in voting games with abstention

Power measures are used to quantify the influence of members of a democratic institution. We consider voting games with abstention or (3,2) games, which are decision-making processes in which voting options include yes, no and abstention. The …

Authors:
Joseph Siani, Bertrand Tchantcho, Bill Proces Tsague

08-03-2024 | Original Paper

Do conservative central bankers weaken the chances of conservative politicians?

In this paper, we challenge the claim that a conservative central bank strengthens the likelihood of a conservative government. In contrast, if an election is based on the comparative advantages of the candidates, an inflation-averse central …

Authors:
Maxime Menuet, Hugo Oriola, Patrick Villieu

Open Access 04-03-2024 | Original Paper

Collective or individual rationality in the Nash bargaining solution: efficiency-free characterizations

In the classical bargaining problem, we propose a very mild axiom of individual rationality, which we call possibility of utility gain. This requires that for at least one bargaining problem, there exists at least one player who reaches a higher …

Author:
Kensei Nakamura

Open Access 27-02-2024 | Original Paper

Approval-based voting with mixed goods

We consider a voting scenario in which the resource to be voted upon may consist of both indivisible and divisible goods. This setting generalizes both the well-studied model of multiwinner voting and the recently introduced model of cake sharing.

Authors:
Xinhang Lu, Jannik Peters, Haris Aziz, Xiaohui Bei, Warut Suksompong

24-02-2024 | Original Paper

Quadratic funding with incomplete information

Quadratic funding is a public good provision mechanism that satisfies desirable theoretical properties, such as efficiency under complete information, and has been gaining popularity in practical applications. We evaluate this mechanism in a …

Authors:
Luis Mota Freitas, Wilfredo L. Maldonado

13-02-2024 | Original Paper

Redistributive politics under ambiguity

The conflicting views that agents and voters have about redistributive taxation have been broadly studied. The literature has focused on situations where the counterfactual outcomes that would have occurred had other actions been chosen are …

Author:
Javier D. Donna

Open Access 13-02-2024 | Original Paper

Dorm augmented college assignments

In college assignments, a common practice is that students receive their dorm allocation after the realization of college placements. This causes wasted resources and unfair allocation. To fix this, we consider a college assignment problem where …

Author:
Mustafa Oǧuz Afacan

03-02-2024 | Original Paper

Relative measures of economic insecurity

We characterize a new class of individual measures of economic insecurity in a setting where there is a single relevant variable that can be interpreted as income or consumption. Insecurity is intended to capture the difficulties faced by an …

Authors:
Walter Bossert, Conchita D’Ambrosio

Open Access 23-01-2024 | Original Paper

Consistent social ranking solutions

The performance of coalitions is an important measure for evaluating individuals. Sport players, researchers, and firm workers are often judged with their team performances. The social ranking solution (SRS) is a function that maps the ranking on …

Authors:
Takahiro Suzuki, Masahide Horita

Open Access 20-01-2024 | Original Paper

The interdependence of social deliberation and judgment aggregation

Imagine that the judgments of some individuals on some issues are aggregated into collective judgments. Social deliberation about the issues prior to aggregation can lead to improved judgments, at both the individual and the collective level. In …

Author:
Hendrik Siebe