Exploring the gaps.- Exploring the gaps.- External influences and framework conditions.- Implications of spatial development policies at European and national levels for border regions The case of Germany.- Implementation of the EU Community Initiative INTERREG III A at the Polish-German border An attempt at evaluation.- Cross-border governance at regional level.- Cross-border co-operation in the Rhine-Scheldt Delta The long road of institution building.- Social capital and other main influences on governance processes in cross-border micro-regions.- Cross-border co-operation between cities and metropolitan regions.- Cross-border cooperation challenges: Positioning the Vienna-Bratislava region.- Inter-urban cooperation in the German-Polish-Czech triangle.- Functional complementarity as basis for inter-metropolitan collaboration and networking A case study on cultural activities in Berlin and Warsaw.- Sectoral perspectives on border regions.- Transborder transport.- Sustainable tourism development in cross-border biosphere reserves of Central and Eastern Europe.- Environmental dimension of transboundary spatial development - driving forces in environmental regionalism.- EThe role of special economic zones in the socio-economic development of Poland's border regions.- Conclusions.- Bridging the gaps?.