The aim of this article is to examine conceptually and empirically how innovative firms combine knowledge (1) provided by different sources, (2) accessed at different spatial scales, and (3) acquired through different channels. We add to the conceptual debate by contrasting and synthesizing the...

Many innovation studies have focused on a narrow concept of technological innovation, such as the generation of patents or the introduction of new products. The performance of firms, however, often depends on innovation defined from a broader perspective. This includes process, organizational,...