The objective of this analysis is that the formation of intergovernmental agreements appears to be strongly influenced by the institutional environment. While each hypothesis has not always been confirmed, together they provide a full explanation of the outcome of the agreement in six of the seven federations. However, in the German case, the institutional approach provided only a partial explanation, indicating that this theory had some shortcomings. Despite these limitations, this work constitutes an effective comparative approach to the study of agreements and a successful application of the theory of institutions in comparative policy. To understand these differences in the formation of intergovernmental agreements, this work proposes a two-component institutionalist approach. .