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Edited by Philip Cooke, Bjørn Asheim, Ron Boschma, Ron Martin, Dafna Schwartz and Franz Tödtling
Chapter 14: Technological Relatedness, Related Variety and Economic Geography
14 Technological relatedness, related variety and economic geography Ron Boschma and Koen Frenken INTRODUCTION In economic geography, increasing attention is paid to the relevance of relatedness for learning and regional development. Relatedness between actors is thought to affect the nature and scope of knowledge spillovers. Relatedness may comprise of many dimensions, such as the cognitive, social, organizational, institutional and the geographical dimension (compare with Chapter 20 on proximity by Carrincazeaux and Coris in this Handbook). Being proximate in these dimensions will enhance the probability of agents to interact and exchange knowledge in an effective manner (Boschma, 2005). That is, distances on at least some of these dimensions need to be overcome in order to connect firms, and to enable interactive learning. In this chapter, we will concentrate on the cognitive and the geographical dimension for reasons of simplicity, but also because these two dimensions have attracted most attention in the recent empirical literature in economic geography. We briefly outline the main theoretical ideas behind the regional-economic relevance of technological relatedness, and we will present a body of empirical work in economic geography that has made an attempt to measure technological relatedness in various ways, and to test its importance for firm and regional performance. More precisely, we discuss in the next section how the notion of related variety has contributed to the literature on externalities and regional growth. In the following section, we take a more dynamic perspective on this issue, and discuss how new growth paths in regions emerge...
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