Aid for Trade came to prominence just over a decade ago at the launch of the World Trade Organization's Doha Round. With its focus on helping least developed countries and economies escape the poverty trap, it aims to strengthen their capabilities to meet market demand and to reduce supply-side constraints such as a lack of trade infrastructure. In accordance with that objective, this report lays out an applied framework for prioritizing potential trade-related interventions and investments according to the expected strength of their combined economic impacts. Along the way, and for the first time, the economic geography of northeastern South Asia has been comprehensively mapped. Computer-driven modeling provides a dynamic portrayal of the economic geography that is a resource for decision makers (and investors). By bringing to light new avenues yielding very high economic benefits for investment and reforms, the framework can give guidance for undertaking trade improvements under Aid for Trade on pilot projects within a national setting, between neighbors or spread to partners further afield. In all cases, the endeavor is the same: expressed in the metaphor of hard investment, it is to build bridges to export markets so that people in the economic periphery have a better opportunity to take poverty off their own maps.