“… 1. The diffusion literature, which explores how ideas and policy regimes that originate in one national political economy spread to other locations within the system, constitutes an important exception (see, e.g., Barthel and Neumayer, 2012; Braun and Gilardi, 2006; Cao, 2010; Elkins et al, 2006; Gandrud, 2013; Gilardi, 2012; Greenhill et al, 2009; Meissner, 2005; Prakash and Potoski, 2007; Simmons and Elkins, 2004; Simmons et al, 2006; Solingen, 2012; Strange, 1996). …”