coalitions in simple games. We characterise those sets of players which can be imposed in the equilibrium coalition and show that … the only decisive structures where the agenda setter can impose the presence of any minimal winning coalition are apex … games, where a large player forms a winning coalition with any of the small players …

coalitions. The paper argues that such volatility reflects the inability of coalition members to build loyal constituency bases …

reduce government spending because they reduce party fragmentation and, therefore, the incidence of coalition governments …