This article presents estimates of the impact of regional variety and trade linkages on regional economic growth by means of export and import data by Italian province (NUTS 3) and sector (three-digit) for the period 1995-2003. Our results show strong evidence that related variety contributes to regional economic growth. Thus, Italian regions that are well endowed with sectors that are complementary in terms of competences (i.e., that show related variety) perform better. The article also assesses the effects of the breadth and relatedness of international trade linkages on regional growth, since they may bring new and related variety to a region. Our analysis demonstrates that regional growth is not affected by simply being well connected to the outside world or having a high variety of knowledge flowing into the region. Rather, we found evidence of related extraregional knowledge sparking intersectoral learning across regions. When the cognitive proximity between the extraregional knowledge and the knowledge base of a region is neither too small nor too large, real learning opportunities are present, and the external knowledge contributes to growth in regional employment. Copyright (c) 2009 Clark University.

Regional economic divergence has become a threat to economic progress, social cohesion and political stability in Europe. Market processes and policies that are supposed to spread prosperity and opportunity are no longer sufficiently effective. The evidence points to the existence of several different modes of regional economic performance in Europe, responding to different development challenges and opportunities. Both mainstream and heterodox theories have gaps in their ability to explain the existence of these different regional trajectories and the weakness of the convergence processes among them. Therefore, a different approach is required, one that strengthens Europe's strongest regions but develops new approaches to promote opportunity in industrial declining and less-developed regions. There is ample new theory and evidence to support such an approach, which we have labelled 'place-sensitive distributed development policy'.

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Innovating firms are likely to face several challenges and experience different types of barriers. In this paper we argue that it is necessary to distinguish between two kinds of barriers to innovation. The first corresponds to what we describe as revealed barriers and reflects the degree of difficulty of the innovation process and the learning experience consequent on the firm engaging in innovation activity. The second type of impediment, which we label deterring barriers, encompasses the obstacles that prevent firms from committing to innovation. We use data from the 4th UK Community Innovation Survey (CIS4) to investigate the relationship between firms' engagement in innovation and their assessment of the barriers to innovation. We show that the relationship is curvilinear in the case of costs and market barriers. These results have important implications for innovation policy and innovation management.