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本文关注产业区的变迁。我们首先基于新古典经济学的外部性概念,提出网络密度的定义,并构建了一个简单的产业区变迁模型;然后将滞后的外部性引入分析并发展了原有模型。模型结果表明,假定其他条件不变,一个地区的企业网络密度处于效率区间内是使该地区成长为产业区并取得良好经济绩效的重要条件。并且,这个效率区间取决于该地区当期及以往各期的企业网络密度。
This article focuses on the changes in the industrial zone. First of all, based on the concept of externality of neoclassical economics, we propose the definition of network density and construct a simple model of industrial area transition. Then we introduce the externalities of lag into the analysis and development of the original model. The model results show that, assuming other conditions remain unchanged, the density of enterprise networks in a region is within the efficiency interval, which is an important condition for the region to grow into an industrial zone and achieve good economic performance. And, this efficiency range depends on the current and past corporate network density in the region.