“…In social network research (Wasserman and Faust, 1994), network models are constructed so that the nodes represent actors (e.g., friends, legislators) who are linked together by some relationship such as friendship, or cosponsorship Christakis and Fowler, 2008;Fowler, 2006;Settle, Bond and Levitt, 2011). Recently, international relations scholars have begun to employ methods from the social network tool kit in order to examine the relationships that structure the international state system (Brewington, Davis and Murdie, 2007;Corbetta, 2007;Maoz, 2009).…”