The main objective of this project is the study of interregional trade with respect to allocation and mobility of production factors. We also study the price differentials between regions, taking the New Trade Theory (NTT) and New Economic Geography (NEG) as theoretical frameworks. We have disaggregated spatial analysis in mind.  The project includes interregional trade of goods and services, hub-spoke structures, factor mobility, concentration of economic activity, specialization by sector, transport infrastructure, border effects, gravity models and network economies.