Materia de An Analysis of Eco-Efficiency in Energy Use and CO2 Emissions in the Swedish Service Industries Artículo Geografía del déficit de vivienda urbano: los casos de Barranquilla y Soledad Capítulo What Drives the Choice of Partners in R&D Cooperation? Heterogeneity across Sectors Documentos de trabajo What Drives the Choice of Partners in R&D Cooperation?: Heterogeneity across Sectors Documentos de trabajo What Drives the Choice of the Type of Partner in R&D Cooperation? Evidence for Spanish Manufactures and Services Artículo