ABSTRACTThe effect of government composition on the ability to make international commitments is an ongoing debate in the literature. Using the veto players and clarity of responsibility theories, I introduce a nuanced understanding of government composition that considers the different types of multiparty governments and the degree of policy incongruence inside them. I test the effects of these variables on the intensity of international commitments with a post-Cold War events dataset of parliamentary European governments. The results of multilevel analyses show that oversized coalitions make more intense commitments than single-party majority governments through responsibility diffusion, though neither approach explains the commitment behavior of minimum winning coalitions. Finally, commitment intensity increases for minority coalitions if their ideological setup leaves the parliamentary opposition fragmented. Ultimately, a government's arithmetic and ideological composition conditions the intensity of its international commitments. I also find that European Union membership has no significant effect on commitment intensity.
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