Related variety and the dynamics of European photonic clusters

This article aims at assessing the role of related variety, that is, the relatedness of knowledge bases used by different sectors within a region, as a major driver of clusters’ development. Some recent theoretical papers underline the role of clusters as ‘knowledge platforms’ organizing the recombination of technologies in overlapping industries, following the seminal definition of clusters by Porter as ‘geographic concentrations of linked industries’. In order to investigate the role of related variety in cluster dynamics, we analyse the patterns of development of clusters specializing in photonics in Europe. Photonics constitutes a new and rapidly evolving set of technologies with a high expected degree of technological recombination. However, due to inadequate traditional sectoral classifications, we propose an original method to delineate the perimeter of photonics in patent databases. A two-step algorithm is then used to identify systematically photonic clusters in Western Europe at the local level. In the last part of the paper, a typology of technological trajectories of clusters over the last decades is developed and then correlated with a set of quantitative measures of technological relatedness. The results highly confirm the role of related variety as a major driver of success, particularly for the biggest European clusters.     

(Un)related variety,urban milieu and tourism-company differentiation

High tourism growth in single-asset tourism cities is often associated with a standardization of supply of products and services by tourism entrepreneurs. However, and in contrast to this common-sense view, tourism growth in specific urban tourism milieus in the ‘sun-sea-sand’ tourism city of Antalya has stimulated tourism entrepreneurs to differentiate their products. Contrary to most economic-geography literature on spatial clusters, evolutionary economic geographers argue that inter-industry relations of (un)related variety are crucial in inter-firm differentiation. The aim of the paper is to define the factors that influence tourism-firm differentiation in the single-asset tourism city of Antalya. The empirical research is theoretically informed by evolutionary economic-geography literature, and pays much attention to the role different urban sub-milieus play in tourism-firm differentiation. It is the first research on the relation between (un)related variety and tourism-firm differentiation in tourism studies. The empirical research is based on primary data collected by a firm-level survey (hotels, restaurants, jewellery- and retail-trade firms) in the city of Antalya. The factors that influence tourism-firm differentiation are explored by using quantitative methods of analysis (an econometric logit-regression model and a correspondence analysis). The main result of the empirical research is that investments in firms in related sectors, in our case jewellery companies and hotels, are positively and significantly related to tourism-firm differentiation. In addition, the location tourism firms in areas visited by a mix of consumers (tourists and locals) also is positively and significantly related to inter-firm differentiation whereas urban milieus visited by locals only have a negative effect.     

The Study of Chinese Internet Slang from the Perspective of Sociolinguistics

网络语言是随着互联网的风靡而兴起的一种新的交际语言。网络语言也以其简约的语风、独特的语法构造、朗朗上口的特点广为流传。本文从社会语言学理论出发,从语言变体、言语社区、以及语言变化的社会语言出发深入浅出的分析网络语言的构成及其稳定性。     

Related variety and economic development: a literature review

Since the introduction of the related variety concept in 2007, a number of studies have been undertaken to analyse its effect on economic development. Our review of 21 studies makes clear that most studies find support for the initial hypothesis that related variety supports employment growth, though some studies suggest that the growth effects of related variety may be specific to knowledge-intensive sectors only. From the review, we list a number of further research questions regarding methodology, the role of unrelated variety, different forms of relatedness and the effect of related variety on knowledge production and entrepreneurship.     

人文地理学理论的多元性

在西方地理学界,八十年代以后,人主义与后现代主义思潮兴起,推动了人地理学理论的多元化发展,在人地理研究中,针对不同性质的问题,应采用与之相对应的适合理论,而不应不顾问题的属性,盲目地追逐理论的新奇时髦。理论与问题的统一性,是运用理论成败的关键。     

海上丝绸之路的中国水下考古概述

我国在历史上的海上丝绸之路中国航段开展的水下考古:在福建平潭发现了装载五代越窑青瓷的沉船遗址;在福建连江、莆田、龙海、平潭、漳浦等海域发现宋、元、明、清各时期的沉船遗址;对广东"南海Ⅰ号"和海南西沙群岛"华光礁Ⅰ号"等宋代沉船遗址、广东"南澳Ⅰ号"明代沉船遗址以及平潭"碗礁一号"清代沉船遗址等进行了水下考古发掘。这些水下考古工作都取得了许多重要的学术成果,对海上丝绸之路及其相关问题研究都有重要参考价值和意义。     

Entrepreneurial industry structures and financial institutions as agents for path dependence in Southwest Norway: the role of the macroeconomic environment

ABSTRACT

Guided by an evolutionary perspective, we study how macroeconomic shifts as an exogenous factor contribute to the endogenous roles of financial institutions and the entrepreneurial industry structure as indicators for path extension or diversification in Southwest Norway. Path extension implies that new firm formation reproduces itself with limited variation. Path diversification implies a departure from existing paths, in that entrepreneurial activities expand into unrelated or related industries. Between 1992 and 1998, we observe a departure from path extension and an increase in entrepreneurial path diversification into unrelated industries, but this trend declines in the following years. The increase and decline are stronger for Southwest Norway than for the rest of the country. Throughout the whole period of observation (1992–2011), we observe a steady decline in path diversification into related industries. Thus, Southwest Norway, and the country as a whole, experiences an extension of an industry structure that increasingly reproduces itself, which implies stronger path dependence and decreasing diversification of related and unrelated entrepreneurial activity. Financial institutions mostly reinforce path extension, even in periods when abundant capital is available, but to some degree, they also induce related path diversification.     

Regional skill relatedness: towards a new measure of regional related diversification

ABSTRACT

This paper proposes a novel index of regional skill-relatedness and calculates this measure for all Norwegian labour-market regions. Studies of regional related diversification rely on measures of related variety, which build on the industry classification hierarchy. However, the growing literature identifying similarities in knowledge and competences across industries demonstrates that these classifications fail to identify a great deal of actual skill relatedness, and that measures based on empirical measures of industry relatedness are required. The skill relatedness measure builds on labour mobility flows across industries to develop a relatedness matrix for Norwegian industries. It further uses social network analysis to identify the number of other regional industries to which each industry in a particular region is related. Comparing this measure to the related variety index, the analysis shows that the two measures are highly correlated, but that the regional skill relatedness index is able to identify more of the relatedness across industries. In particular, the related variety index tends to underestimate the level of relatedness in many of Norway’s most technologically sophisticated manufacturing regions, whereas these rank highly in the regional skill relatedness index. Consequently, the regional skill relatedness index represents a promising new tool for identifying relatedness in regional systems.     

There are Many Roads to Reindustrialization and Resilience: Place-based Approaches in Three German Urban Regions

Reindustrialization has become a major political objective in the European Union. This paper provides three urban case studies on reindustrialization pathways and experiences during the global economic crisis to reveal the specificities of place-based approaches on the local level despite common policies on EU, federal and state levels. Moreover, the evolutionary perspective on reindustrialization and economic resilience shows the importance of adaptive capabilities on the local level, although the sources for these capabilities differ according to context- and place-specific structures.