Trade Policy, Economic Interests and Party Politics in a Developing Country: The Political Economy of CAFTA-DR. Dustin Tingley, 2014, Paper. "Developing countries have increasingly opened their economies to trade. Research about trade policy in developed countries focuses on a bottom-up process by identifying economic preferences of domestic groups. We know less about developing countries. We analyze how economic and political variables influenced Costa Rican voters in a referendum on CAFTA-DR, an international trade agreement. We find little support for..." Link verified October 8, 2014