“…Others have considered the "persistence" of inequalities and their causes and the additional determinants of regional productivity, such as infrastructures, human capital,(De la Fuente, 2009;Montes-Sola, Faiña, & López-Rodriguez, 2016;Rodríguez-López, Martínez-López, & Romero-Avila, 2009), R&D and innovation (like did the IVIE group) and the role of the entrepreneurs in regional development, a topic not sufficiently clarified.All this illustrates not just an expansion of the search for factors to explain the disparities, but also analyses including innovations in terms of analytical techniques. From this point of view, some contributions must be specially considered:Ríos (2017) what drives unemployment disparities in European regions; Ramos, Suriñach, and Artís (2010) linked human capital spillovers with regional productivity and convergence;Castells-Quintana and Royuela (2014) provided an excellent analysis of the connections between agglomeration, inequality and economic growth andMárquez, Ramajo, and Hewings (2017) proposed a simple but innovative way to measure the role of geographical location in economic inequality. The novelty is that they decomposed global inequality into its within-country and between-country components, assessing which part of these components could be related to neighbourhood factors.…”