The PartNET++ system is an experimental multi-agent-based simulation tool that uses a new model based on hyper-graphs for understanding partnership formation among heterogeneous agents. Based on a previous tool called PART-NET, by Conte and Pedone [1], the agents of the system have goals to achieve and actions that lead to these goals, which must be performed by other agents. When choosing preferred partners, the agents may have different strategies. In PART-NET, partnerships were restricted to two agents, and the authors have shown that some social hypotheses were proved to hold. By using the PartNet++ simulator in several experiments, it is shown in this work that most results that are valid for partnerships between two agents can be generalized for multiple agents. Categories and Subject Descriptors I.2.11 [Artificial Intelligence]: Distributed Artificial Intelligence – multiagent systems, intelligent agents. General Terms Algorithms, Measurement, Design, Economics, Experimentati...