Regional economic organizations of developing countries have a mixed record of success. The author examines national decisions, regional institutions and selected cases using a cognitive framing model in order to better understand the reasons behind their failures and successes. Case studies are included on Chile (Andean Pact), Nigeria (ECOWAS) and the Philippines (ASEAN). This study will interest researchers and graduate-level students of regional economic integration, political economy of developing countries, as well as specialists in Latin America, West Africa, and Southeast Asia.