On September 30th, 2020, Diego Ocampo defended his doctoral thesis titled "One Renewable Energy Innovation and its Knowledge Flow's Sources and Nature” supervised by Dr. Jordi Suriñach and Dr. Rosina Moreno.

The doctoral committee was composed of Dr. José García Quevedo (Universitat de Barcelona) Dr. Davide Consoli (Consejo Superior de Investigaciones Cientificas) and Dr. Sandro Montresor (Gran Sasso Science Institute of l'Aquila) who decided to grade the PhD thesis with an “Excellent”.

This doctoral thesis studies the importance of the different sources of knowledge that might foster innovation in renewable energies (regarded as a specific technological field). Contributes to the literature by considering the concept of knowledge base underlying the innovation in this field and by trying to deepen the understanding of the concept of distance and how it relates to knowledge diffusion. The empirical assessment of the hypotheses stated in this thesis is based on the analysis of patent data. The main findings of the thesis point to the facts that renewable energies innovation enjoys to a higher extent from knowledge from science and also that close interaction between in inventors is necessary to promote innovation in this field. At the same time the thesis opens new questions regarding the relation of the knowledge nature of a technology and the concept of distance.