We analyze coalition formation problems in which a group of agents is partitioned into coalitions and agents' preferences only depend on the coalition they belong to. We study rules that associate to each profile of agents' preferences a partition of the society. We focus on strategy-proof rules...

This paper explores the existence of stable research teams, when each agent's preferences depend on the set of researchers collaborating with her. We introduce a property over researchers' preferences, called tops responsiveness guaranteeing the existence of stable research teams configurations....

This paper studies many-to-one matching markets in which each agent’s preferences not only depend on the institution that hires her, but also on the group of her colleagues, which are matched to the same institution. With an unrestricted domain of preferences the non-emptiness of the core is...

Dominant strategies truthful implementation of flexible social objectives involves the ability of the planner to alter the individual incentives in such a way that the externality imposed on society by each agent reporting a given type is fully internalized in the agent’s final payoff. In...

In this paper we introduce a new concept of solidarity in terms of reciprocity and characterize the set of social choice functions that are reciprocate (in both a strong and a weak sense), anonymous and efficient in a standard public good provision model when the agents have single-peaked...

In the citizen-candidate approach each citizen chooses whether or not to run as candidate. In this paper we find that the strategic entry-exit decision of the candidates eliminates one of the most undesirable properties of Plurality rule, namely to elect a poor candidate in three-candidate...

The purpose of this paper is twofold: first, we propose a coherent model of implementation of ethical norms that we believe is both compatible with the rigorous decision analysis of game theory and with the well-established tradition of ethics in moral philosophy and argue that this kind of...

Plurality rule, when applied to a fixed agenda setting, is mostly criticized from being capable of choosing an alternative considered as worst by a strict majority. In this paper we consider an endogenous agenda setting with no more than three alternatives. In those equilibria where the...