national innovation systems. The study also analyses the factors behind this industry's poor productivity growth. A scenario …

. The business services industry has an important role in the national innovation system and in knowledge spillovers to … other industries. The innovation contribution of business services to the rest of the economy may countervail the effect of … strengthening its role in knowledge spillovers to client industries. …

in this area uses “backward” citations to measure technological knowledge acquired by the patenting entities studied …. “Forward” citations (citations to the firm’s patents made by other patents) have been interpreted as a measure of the knowledge … good measure of knowledge flows. Our paper assesses the legitimacy of using European patent citations as a measure of …

of analysis. Considering as unit of analysis the region of Beira Interior (Portugal), this article aims to provide a TOWS …