Abstract
The purpose of this paper is to propose indicators of structural stability of alliances such as business consortiums and political parties. This research is based on Landscape Theory, which simulates alliance formation process with the pairwise propensities to cooperate with some agents and oppose others. The theory assumes the agents in the same alliance have no frustration against each other from the short range viewpoint. In this study, from the long range viewpoint, we suppose frustrations of each agent shouldn't be ignored and that the lower the frustration of each agent in an alliance is, the more stable the alliance is. Then this paper introduces a new concept, "discontent", derived from propensity. Based on that, we propose indicators for structural stability.
