'The authors propose a solution for bargaining problems where coalitions are bargainers. The solution generalizes the Nash solution and allows one to interpret a coalition as an institutional player whose preferences are obtained by aggregating the preferences of the individual members. One implication of the solution is that forming a coalition is unprofitable in pure-bargaining situations (the joint-bargaining paradox). The authors show, however, that forming a coalition can be profitable in a non-pure bargaining situation.' (author's abstract)'In der vorliegenden Arbeit schlagen die Autoren ein Loesungskonzept fuer Verhandlungsspiele vor, bei denen die verhandelnden Parteien aus Koalitionen von Individuen bestehen koennen. Ihr Loesungsko...