We survey and assess the literature on the positive and negative effects of ethnic diversity
on economic policies and outcomes. Our focus is on communities of different size and …

We consider the partitioning of a society into coalitions in purely hedonic settings, ie, where
each player's payoff is completely determined by the identity of other members of her …

We analyze the core of a class of coalition formation game in which every player's payoff
depends only on the members of her coalition. We first consider anonymous games and …

In-group favoritism is a central aspect of human behavior. People often help members of
their own group more than members of other groups. Here we propose a mathematical …

The work we present in this article initiated the formal study of fractional hedonic games
(FHGs), coalition formation games in which the utility of a player is the average value he …

This paper quantitatively analyzes the stability and breakup of nations. The tradeoff between
increasing returns in the provision of public goods and the costs of greater cultural …

This article develops a model of parties in multi-party systems. Instead of treating parties as
vote-maximizing candidates able to take any position, parties are assumed to be controlled …

Coalition formation provides a versatile framework for analyzing cooperative behavior in
multi-agent systems. In particular, hedonic coalition formation has gained considerable …

In this paper we relax two common assumptions that are made when studying coalition
formation. The first is that any number of coalitions can be formed; the second is that any …

We model individual identification choice as a strategic group formation problem. When
choosing a social group to identify with, individuals appreciate high social status and a …