The interaction of international institutions from a social network perspective

The literature increasingly acknowledges that international institutions do not exist in isolation, but regularly interact with each other. This interplay might induce influence, affecting institutions' development and performance. The following research adds to this debate by systematically analyzing the quantitative evidence on how institutional interaction drives institutional design from a network perspective. Using dyadic cross-sectional data on international environmental agreements in 1952-2000, the authors find support for their theoretical argument that regimes' similarity in design as captured by their degree of legalization strongly depends on institutions' interaction. However, while soft law'' disseminates between regimes that are well connected through direct or indirect links, this does not apply to hard law.'' The authors explain this divergence with states' concerns about binding-law commitments and sovereignty costs associated with the latter. This research may have important implications for studies of international institutions and of network analysis in general.