Our study has the aim of defining the impact generated by the technological infrastructure on innovation and economic growth in the countries of the Organization for Economic Cooperation and Development (OECD). We will draw inspiration from the "Quadruple Helix of Innovation" theory (QH) in order to construct a theoretical model of economic growth that will assess the role played by a set of technological infrastructures belonging to different "innovation ecosystems", in the presence of innovation open systems and the "mode 3" of knowledge production. We chose the recent QH theory on National Innovation Systems (NIS) as it describes a new economic reality where innovation is seen as the result of co-creation between businesses, citizens, universities and government, in a context characterized by the existence of partnerships, networks of collaboration and symbiotic relationships. A theoretical model of economic growth based on R & D and on productive public spending will be developed to demonstrate the importance of the existence of technological infrastructure in promoting innovation, and ultimately its contribution to economic growth. This will make it possible to evaluate the effects of productive public spending through a study of "transitional dynamics" and an empirical analysis based on the new database CANA (2011).
