This study conducts a meta-analysis of empirical studies that have measured the spatial scale of industrial clustering. Two types of scales are examined: the peak scale (at which cluster effects are maximized) and the maximum reach (beyond which cluster effects are undetectable). We find that the scale varies significantly by the unit of analysis, industry sector, country of study, and the sources of cluster effects examined (e.g., knowledge spillovers, localization, and urbanization). Planners and policy makers should tailor the geographies embodied in cluster strategies to match the specific local needs and circumstances.

中文翻译：

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产业集群在空间上有多集中？：荟萃分析

这项研究对实证研究进行了荟萃分析，这些实证研究测量了产业集群的空间规模。检查了两种类型的量表：峰值量表（最大的簇效应）和最大范围（超过最大的簇效应无法检测到）。我们发现，规模因分析单位，行业部门，研究国家和所考察的集群效应的来源（例如知识溢出，本地化和城市化）而有很大差异。计划者和政策制定者应调整集群策略中体现的地理位置，以适应当地的特定需求和情况。