We propose a framework to analyze coalition formation with heterogeneous agents. Existing literature defines stability … conditions that do not ensure that, once an agent decides to sign an agreement, the enlarged coalition is feasible. Defining the … concepts of refraction and exchanging, we set up conditions of existence and enlargement of a coalition with heterogeneous …

, then a non-winning coalition forms as an intermediate bargaining step and the final winning coalition is not necessarily …

to guarantee internal stability and to maximize the sum of utilities of coalition members. The transfers scheme is tested …, einer Koalition beizutreten oder nicht. Bezüglich der Koalitionäre wird kollektive Wohlfahrtsmaximierung angenommen …, Outsider handeln individuell rational. Für die Aufteilung des durch die Koalition generierten Effizienzgewinns wird ein …

modifications: first, payoff division can only be agreed upon after the coalition has formed (two-stage bargaining); second …, negotiations in the coalition can break down, in which case a new coalition may be formed (reversible coalitions). Under the most … propoper advantage and a linear relationship between weights and ex post payoffs for all coalition members other than the …