How do countries make policy in an uncertain world? Do policymakers look inward, rationally designing policies to fit domestic interests, ideas, and institutions? Or do they look outward, imitating policy elements from other countries? And if the latter, where do they look? Focusing on the...

Despite theoretical and methodological progress in what is now coined as the third generation of diffusion studies, explicitly dealing with the causal mechanisms underlying diffusion processes and comparatively analyzing them is only of recent date. As a matter of fact, diffusion research has...