I have introduced the concept of inter-presidentialism to account for progress of regional integration in the absence of supranational institutions. The argument is that, in some regional organizations, domestic institutions have underpinned presidential diplomacy as main mechanism of decision-making and dispute-settlement.

I have documented a growing gap between rhetoric and achievement in Mercosur. I argue that one reason underlying this phenomenon is a misunderstanding of the European experience with integration. I also explain how, partly as a consequence of Mercosur's diminishing returns, Brazil's foreign policy has silently redefined its priorities away from the region and towards the global stage. My collaborative research shows that, unlike Brazil and Mexico, Argentina's foreign policy is rooted in domestic rather than systemic factors.

I have studied subnational, national and supranational legislatures. My findings show that there is little diversity both regarding bicameralism across Argentine provinces and legislative behavior across political parties in Buenos Aires province. I also argue that labeling Latin American supranational assemblies as 'parliaments' incurs in gross conceptual stretching.